571491642 has 16 divisors (see below), whose sum is σ = 1160043552. Its totient is φ = 187653840.

The previous prime is 571491637. The next prime is 571491643. The reversal of 571491642 is 246194175.

It is a self number, because there is not a number n which added to its sum of digits gives 571491642.

It is not an unprimeable number, because it can be changed into a prime (571491643) 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, 710409 + ... + 711212.

It is an arithmetic number, because the mean of its divisors is an integer number (72502722).

Almost surely, 2^571491642 is an apocalyptic number.

571491642 is an abundant number, since it is smaller than the sum of its proper divisors (588551910).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

571491642 is a wasteful number, since it uses less digits than its factorization.

571491642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1421693.

The product of its digits is 60480, while the sum is 39.

The square root of 571491642 is about 23905.8913659374. The cubic root of 571491642 is about 829.8570625294.

The spelling of 571491642 in words is "five hundred seventy-one million, four hundred ninety-one thousand, six hundred forty-two".