10572781 has 4 divisors (see below), whose sum is σ = 10677564. Its totient is φ = 10468000.

The previous prime is 10572769. The next prime is 10572799. The reversal of 10572781 is 18727501.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18727501 = 13 ⋅1440577.

It can be written as a sum of positive squares in 2 ways, for example, as 7209225 + 3363556 = 2685^2 + 1834^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10572781 is a prime.

It is a super-2 number, since 2×10572781² = 223567396147922, which contains 22 as substring.

It is a Duffinian number.

It is a nialpdrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10572481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52240 + ... + 52441.

It is an arithmetic number, because the mean of its divisors is an integer number (2669391).

Almost surely, 2^10572781 is an apocalyptic number.

It is an amenable number.

10572781 is a deficient number, since it is larger than the sum of its proper divisors (104783).

10572781 is a wasteful number, since it uses less digits than its factorization.

10572781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104782.

The product of its (nonzero) digits is 3920, while the sum is 31.

The square root of 10572781 is about 3251.5813076102. The cubic root of 10572781 is about 219.4807381703.

The spelling of 10572781 in words is "ten million, five hundred seventy-two thousand, seven hundred eighty-one".