1572056641 has 4 divisors (see below), whose sum is σ = 1572136384. Its totient is φ = 1571976900.

The previous prime is 1572056627. The next prime is 1572056669. The reversal of 1572056641 is 1466502751.

It is a happy number.

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 a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1572056641 - 2⁵ = 1572056609 is a prime.

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 1572056641.

It is not an unprimeable number, because it can be changed into a prime (1572056441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13636 + ... + 57706.

It is an arithmetic number, because the mean of its divisors is an integer number (393034096).

Almost surely, 2^1572056641 is an apocalyptic number.

It is an amenable number.

1572056641 is a deficient number, since it is larger than the sum of its proper divisors (79743).

1572056641 is an equidigital number, since it uses as much as digits as its factorization.

1572056641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79742.

The product of its (nonzero) digits is 50400, while the sum is 37.

The square root of 1572056641 is about 39649.1694868884. The cubic root of 1572056641 is about 1162.7581614338.

It can be divided in two parts, 15720 and 56641, that added together give a square (72361 = 269²).

The spelling of 1572056641 in words is "one billion, five hundred seventy-two million, fifty-six thousand, six hundred forty-one".