72626421 has 16 divisors (see below), whose sum is σ = 113025024. Its totient is φ = 40617264.

The previous prime is 72626419. The next prime is 72626423. The reversal of 72626421 is 12462627.

It is an interprime number because it is at equal distance from previous prime (72626419) and next prime (72626423).

It is not a de Polignac number, because 72626421 - 2¹ = 72626419 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72626423) 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, 35805 + ... + 37778.

It is an arithmetic number, because the mean of its divisors is an integer number (7064064).

Almost surely, 2^72626421 is an apocalyptic number.

It is an amenable number.

72626421 is a deficient number, since it is larger than the sum of its proper divisors (40398603).

72626421 is a wasteful number, since it uses less digits than its factorization.

72626421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73640.

The product of its digits is 8064, while the sum is 30.

The square root of 72626421 is about 8522.1136462734. The cubic root of 72626421 is about 417.2197715529.

The spelling of 72626421 in words is "seventy-two million, six hundred twenty-six thousand, four hundred twenty-one".