1057521 has 8 divisors (see below), whose sum is σ = 1484320. Its totient is φ = 667872.

The previous prime is 1057493. The next prime is 1057531. The reversal of 1057521 is 1257501.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1057521 - 2⁵ = 1057489 is a prime.

It is a super-2 number, since 2×1057521² = 2236701330882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1057531) 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, 9220 + ... + 9333.

It is an arithmetic number, because the mean of its divisors is an integer number (185540).

2^1057521 is an apocalyptic number.

It is an amenable number.

1057521 is a deficient number, since it is larger than the sum of its proper divisors (426799).

1057521 is a wasteful number, since it uses less digits than its factorization.

1057521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18575.

The product of its (nonzero) digits is 350, while the sum is 21.

The square root of 1057521 is about 1028.3584005589. The cubic root of 1057521 is about 101.8817352868.

It can be divided in two parts, 105 and 7521, that added together give a triangular number (7626 = T₁₂₃).

The spelling of 1057521 in words is "one million, fifty-seven thousand, five hundred twenty-one".