72622121 has 16 divisors (see below), whose sum is σ = 85857408. Its totient is φ = 60556800.

The previous prime is 72622117. The next prime is 72622127. The reversal of 72622121 is 12122627.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 72622121 - 2² = 72622117 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72622127) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22361 + ... + 25401.

It is an arithmetic number, because the mean of its divisors is an integer number (5366088).

Almost surely, 2^72622121 is an apocalyptic number.

It is an amenable number.

72622121 is a deficient number, since it is larger than the sum of its proper divisors (13235287).

72622121 is a wasteful number, since it uses less digits than its factorization.

72622121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3232.

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

The square root of 72622121 is about 8521.8613577082. The cubic root of 72622121 is about 417.2115372657.

Adding to 72622121 its reverse (12122627), we get a palindrome (84744748).

The spelling of 72622121 in words is "seventy-two million, six hundred twenty-two thousand, one hundred twenty-one".