72262121 has 8 divisors (see below), whose sum is σ = 76943520. Its totient is φ = 67628608.

The previous prime is 72262117. The next prime is 72262123. The reversal of 72262121 is 12126227.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 72262121 - 2² = 72262117 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72262123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8831 + ... + 14916.

It is an arithmetic number, because the mean of its divisors is an integer number (9617940).

Almost surely, 2^72262121 is an apocalyptic number.

It is an amenable number.

72262121 is a deficient number, since it is larger than the sum of its proper divisors (4681399).

72262121 is a wasteful number, since it uses less digits than its factorization.

72262121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23943.

The product of its digits is 672, while the sum is 23.

The square root of 72262121 is about 8500.7129700984. The cubic root of 72262121 is about 416.5209991781.

Adding to 72262121 its reverse (12126227), we get a palindrome (84388348).

The spelling of 72262121 in words is "seventy-two million, two hundred sixty-two thousand, one hundred twenty-one".