1052621 has 4 divisors (see below), whose sum is σ = 1059744. Its totient is φ = 1045500.

The previous prime is 1052609. The next prime is 1052629. The reversal of 1052621 is 1262501.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1262501 = 701 ⋅1801.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1052621 is a prime.

It is a super-2 number, since 2×1052621² = 2216021939282, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1052621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1052629) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3335 + ... + 3636.

It is an arithmetic number, because the mean of its divisors is an integer number (264936).

2^1052621 is an apocalyptic number.

It is an amenable number.

1052621 is a deficient number, since it is larger than the sum of its proper divisors (7123).

1052621 is an equidigital number, since it uses as much as digits as its factorization.

1052621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7122.

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

The square root of 1052621 is about 1025.9731965310. The cubic root of 1052621 is about 101.7241360410.

Subtracting from 1052621 its product of nonzero digits (120), we obtain a palindrome (1052501).

The spelling of 1052621 in words is "one million, fifty-two thousand, six hundred twenty-one".