72490505 has 4 divisors (see below), whose sum is σ = 86988612. Its totient is φ = 57992400.

The previous prime is 72490489. The next prime is 72490513. The reversal of 72490505 is 50509427.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 49603849 + 22886656 = 7043^2 + 4784^2 .

It is not a de Polignac number, because 72490505 - 2⁴ = 72490489 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7249046 + ... + 7249055.

It is an arithmetic number, because the mean of its divisors is an integer number (21747153).

Almost surely, 2^72490505 is an apocalyptic number.

It is an amenable number.

72490505 is a deficient number, since it is larger than the sum of its proper divisors (14498107).

72490505 is a wasteful number, since it uses less digits than its factorization.

72490505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14498106.

The product of its (nonzero) digits is 12600, while the sum is 32.

The square root of 72490505 is about 8514.1355991081. The cubic root of 72490505 is about 416.9593417488.

The spelling of 72490505 in words is "seventy-two million, four hundred ninety thousand, five hundred five".