2561572 has 12 divisors (see below), whose sum is σ = 4827676. Its totient is φ = 1182240.

The previous prime is 2561551. The next prime is 2561593. The reversal of 2561572 is 2751652.

It is an interprime number because it is at equal distance from previous prime (2561551) and next prime (2561593).

It can be written as a sum of positive squares in 2 ways, for example, as 556516 + 2005056 = 746^2 + 1416^2 .

It is a super-2 number, since 2×2561572² = 13123302222368, which contains 22 as substring.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a d-powerful number, because it can be written as 2¹⁵ + 5⁸ + 6⁸ + 1 + 5⁸ + 7⁴ + 2¹⁶ .

It is a self number, because there is not a number n which added to its sum of digits gives 2561572.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24579 + ... + 24682.

2^2561572 is an apocalyptic number.

It is an amenable number.

2561572 is a deficient number, since it is larger than the sum of its proper divisors (2266104).

2561572 is a wasteful number, since it uses less digits than its factorization.

2561572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49278 (or 49276 counting only the distinct ones).

The product of its digits is 4200, while the sum is 28.

The square root of 2561572 is about 1600.4911746086. The cubic root of 2561572 is about 136.8260708608.

The spelling of 2561572 in words is "two million, five hundred sixty-one thousand, five hundred seventy-two".