72506254 has 4 divisors (see below), whose sum is σ = 108759384. Its totient is φ = 36253126.

The previous prime is 72506251. The next prime is 72506257. The reversal of 72506254 is 45260527.

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

It is an interprime number because it is at equal distance from previous prime (72506251) and next prime (72506257).

It is a super-2 number, since 2×72506254² = 10514313738225032, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72506251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18126562 + ... + 18126565.

It is an arithmetic number, because the mean of its divisors is an integer number (27189846).

Almost surely, 2^72506254 is an apocalyptic number.

72506254 is a deficient number, since it is larger than the sum of its proper divisors (36253130).

72506254 is a wasteful number, since it uses less digits than its factorization.

72506254 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36253129.

The product of its (nonzero) digits is 16800, while the sum is 31.

The square root of 72506254 is about 8515.0604225689. The cubic root of 72506254 is about 416.9895352073.

The spelling of 72506254 in words is "seventy-two million, five hundred six thousand, two hundred fifty-four".