72409142 has 16 divisors (see below), whose sum is σ = 118178592. Its totient is φ = 33073920.

The previous prime is 72409097. The next prime is 72409153. The reversal of 72409142 is 24190427.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11834 + ... + 16877.

It is an arithmetic number, because the mean of its divisors is an integer number (7386162).

Almost surely, 2^72409142 is an apocalyptic number.

72409142 is a deficient number, since it is larger than the sum of its proper divisors (45769450).

72409142 is a wasteful number, since it uses less digits than its factorization.

72409142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28823.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 72409142 is about 8509.3561448561. The cubic root of 72409142 is about 416.8032856175.

Adding to 72409142 its reverse (24190427), we get a palindrome (96599569).

The spelling of 72409142 in words is "seventy-two million, four hundred nine thousand, one hundred forty-two".