1051640 has 32 divisors (see below), whose sum is σ = 2410560. Its totient is φ = 412800.

The previous prime is 1051639. The next prime is 1051643. The reversal of 1051640 is 461501.

It is a happy number.

It is a super-2 number, since 2×1051640² = 2211893379200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1051643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2225 + ... + 2655.

It is an arithmetic number, because the mean of its divisors is an integer number (75330).

2^1051640 is an apocalyptic number.

1051640 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 1051640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1205280).

1051640 is an abundant number, since it is smaller than the sum of its proper divisors (1358920).

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

1051640 is a wasteful number, since it uses less digits than its factorization.

1051640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 503 (or 499 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 1051640 is about 1025.4950024257. The cubic root of 1051640 is about 101.6925252985.

The spelling of 1051640 in words is "one million, fifty-one thousand, six hundred forty".