72621134 has 4 divisors (see below), whose sum is σ = 108931704. Its totient is φ = 36310566.

The previous prime is 72621089. The next prime is 72621139. The reversal of 72621134 is 43112627.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 43112627 = 2767 ⋅15581.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72621139) by changing a digit.

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 as a sum of consecutive naturals, namely, 18155282 + ... + 18155285.

It is an arithmetic number, because the mean of its divisors is an integer number (27232926).

Almost surely, 2^72621134 is an apocalyptic number.

72621134 is a deficient number, since it is larger than the sum of its proper divisors (36310570).

72621134 is a wasteful number, since it uses less digits than its factorization.

72621134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36310569.

The product of its digits is 2016, while the sum is 26.

The square root of 72621134 is about 8521.8034476277. The cubic root of 72621134 is about 417.2096471636.

The spelling of 72621134 in words is "seventy-two million, six hundred twenty-one thousand, one hundred thirty-four".