72401357 has 4 divisors (see below), whose sum is σ = 82744416. Its totient is φ = 62058300.

The previous prime is 72401333. The next prime is 72401363. The reversal of 72401357 is 75310427.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 75310427 = 5843 ⋅12889.

It is a cyclic number.

It is not a de Polignac number, because 72401357 - 2⁸ = 72401101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72401377) 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 in 3 ways as a sum of consecutive naturals, for example, 5171519 + ... + 5171532.

It is an arithmetic number, because the mean of its divisors is an integer number (20686104).

Almost surely, 2^72401357 is an apocalyptic number.

It is an amenable number.

72401357 is a deficient number, since it is larger than the sum of its proper divisors (10343059).

72401357 is a wasteful number, since it uses less digits than its factorization.

72401357 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10343058.

The product of its (nonzero) digits is 5880, while the sum is 29.

The square root of 72401357 is about 8508.8986948958. The cubic root of 72401357 is about 416.7883476793.

The spelling of 72401357 in words is "seventy-two million, four hundred one thousand, three hundred fifty-seven".