1052640 has 144 divisors (see below), whose sum is σ = 3891888. Its totient is φ = 258048.

The previous prime is 1052629. The next prime is 1052663. The reversal of 1052640 is 462501.

1052640 = T₂₅ + T₂₆ + ... + T₁₈₄.

It is a happy number.

1052640 is nontrivially palindromic in base 11.

It is a tau number, because it is divible by the number of its divisors (144).

It is a super-2 number, since 2×1052640² = 2216101939200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24459 + ... + 24501.

It is an arithmetic number, because the mean of its divisors is an integer number (27027).

2^1052640 is an apocalyptic number.

1052640 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 1052640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1945944).

1052640 is an abundant number, since it is smaller than the sum of its proper divisors (2839248).

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

1052640 is a wasteful number, since it uses less digits than its factorization.

1052640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81 (or 70 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 1052640 is about 1025.9824559904. The cubic root of 1052640 is about 101.7247480837.

It can be divided in two parts, 10 and 52640, that added together give a triangular number (52650 = T₃₂₄).

The spelling of 1052640 in words is "one million, fifty-two thousand, six hundred forty".