72401745 has 16 divisors (see below), whose sum is σ = 124754112. Its totient is φ = 35643840.

The previous prime is 72401743. The next prime is 72401773. The reversal of 72401745 is 54710427.

It is not a de Polignac number, because 72401745 - 2¹ = 72401743 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72401743) 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, 185451 + ... + 185840.

It is an arithmetic number, because the mean of its divisors is an integer number (7797132).

Almost surely, 2^72401745 is an apocalyptic number.

It is an amenable number.

72401745 is a deficient number, since it is larger than the sum of its proper divisors (52352367).

72401745 is a wasteful number, since it uses less digits than its factorization.

72401745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 371312.

The product of its (nonzero) digits is 7840, while the sum is 30.

The square root of 72401745 is about 8508.9214945256. The cubic root of 72401745 is about 416.7890922030.

The spelling of 72401745 in words is "seventy-two million, four hundred one thousand, seven hundred forty-five".