1051620 has 48 divisors (see below), whose sum is σ = 3120768. Its totient is φ = 263680.

The previous prime is 1051619. The next prime is 1051621. The reversal of 1051620 is 261501.

1051620 = T₅₀ + T₅₁ + ... + T₁₈₅.

It is an interprime number because it is at equal distance from previous prime (1051619) and next prime (1051621).

It is a super-3 number, since 3×1051620³ = 3488974263334584000, which contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 1051620.

It is not an unprimeable number, because it can be changed into a prime (1051621) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 505 + ... + 1535.

It is an arithmetic number, because the mean of its divisors is an integer number (65016).

2^1051620 is an apocalyptic number.

1051620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1051620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1560384).

1051620 is an abundant number, since it is smaller than the sum of its proper divisors (2069148).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1051620 is a wasteful number, since it uses less digits than its factorization.

1051620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1060 (or 1058 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 15.

The square root of 1051620 is about 1025.4852509910. The cubic root of 1051620 is about 101.6918806345.

The spelling of 1051620 in words is "one million, fifty-one thousand, six hundred twenty".