72571402 has 16 divisors (see below), whose sum is σ = 115473600. Its totient is φ = 34088128.

The previous prime is 72571327. The next prime is 72571439. The reversal of 72571402 is 20417527.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20349 + ... + 23647.

It is an arithmetic number, because the mean of its divisors is an integer number (7217100).

Almost surely, 2^72571402 is an apocalyptic number.

72571402 is a deficient number, since it is larger than the sum of its proper divisors (42902198).

72571402 is a wasteful number, since it uses less digits than its factorization.

72571402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3965.

The product of its (nonzero) digits is 3920, while the sum is 28.

The square root of 72571402 is about 8518.8850209402. The cubic root of 72571402 is about 417.1143883542.

Adding to 72571402 its reverse (20417527), we get a palindrome (92988929).

It can be divided in two parts, 725 and 71402, that added together give a palindrome (72127).

The spelling of 72571402 in words is "seventy-two million, five hundred seventy-one thousand, four hundred two".