72406051 has 8 divisors (see below), whose sum is σ = 72964544. Its totient is φ = 71850240.

The previous prime is 72406031. The next prime is 72406057. The reversal of 72406051 is 15060427.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 72406051 - 2¹⁵ = 72373283 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72406057) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 107251 + ... + 107923.

It is an arithmetic number, because the mean of its divisors is an integer number (9120568).

Almost surely, 2^72406051 is an apocalyptic number.

72406051 is a deficient number, since it is larger than the sum of its proper divisors (558493).

72406051 is a wasteful number, since it uses less digits than its factorization.

72406051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1341.

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 72406051 is about 8509.1745193056. The cubic root of 72406051 is about 416.7973547030.

Adding to 72406051 its reverse (15060427), we get a palindrome (87466478).

The spelling of 72406051 in words is "seventy-two million, four hundred six thousand, fifty-one".