72675261 has 6 divisors (see below), whose sum is σ = 104975390. Its totient is φ = 48450168.

The previous prime is 72675259. The next prime is 72675277. The reversal of 72675261 is 16257627.

72675261 is a `hidden beast` number, since 72 + 67 + 526 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 71064900 + 1610361 = 8430^2 + 1269^2 .

It is not a de Polignac number, because 72675261 - 2¹ = 72675259 is a prime.

It is a super-2 number, since 2×72675261² = 10563387122836242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72675241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4037506 + ... + 4037523.

Almost surely, 2^72675261 is an apocalyptic number.

It is an amenable number.

72675261 is a deficient number, since it is larger than the sum of its proper divisors (32300129).

72675261 is a wasteful number, since it uses less digits than its factorization.

72675261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8075035 (or 8075032 counting only the distinct ones).

The product of its digits is 35280, while the sum is 36.

The square root of 72675261 is about 8524.9786509997. The cubic root of 72675261 is about 417.3132749333.

The spelling of 72675261 in words is "seventy-two million, six hundred seventy-five thousand, two hundred sixty-one".