72121562 has 8 divisors (see below), whose sum is σ = 111672192. Its totient is φ = 34897500.

The previous prime is 72121559. The next prime is 72121573. The reversal of 72121562 is 26512127.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 581564 + ... + 581687.

It is an arithmetic number, because the mean of its divisors is an integer number (13959024).

Almost surely, 2^72121562 is an apocalyptic number.

72121562 is a deficient number, since it is larger than the sum of its proper divisors (39550630).

72121562 is a wasteful number, since it uses less digits than its factorization.

72121562 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1163284.

The product of its digits is 1680, while the sum is 26.

The square root of 72121562 is about 8492.4414628539. The cubic root of 72121562 is about 416.2507618115.

Adding to 72121562 its reverse (26512127), we get a palindrome (98633689).

The spelling of 72121562 in words is "seventy-two million, one hundred twenty-one thousand, five hundred sixty-two".