71925156 has 18 divisors (see below), whose sum is σ = 181810902. Its totient is φ = 23975040.

The previous prime is 71925149. The next prime is 71925173. The reversal of 71925156 is 65152917.

It can be written as a sum of positive squares in only one way, i.e., 59814756 + 12110400 = 7734^2 + 3480^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 1997921 = 71925156 / (7 + 1 + 9 + 2 + 5 + 1 + 5 + 6).

It is a self number, because there is not a number n which added to its sum of digits gives 71925156.

It is an unprimeable number.

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 in 5 ways as a sum of consecutive naturals, for example, 998925 + ... + 998996.

Almost surely, 2^71925156 is an apocalyptic number.

It is an amenable number.

71925156 is an abundant number, since it is smaller than the sum of its proper divisors (109885746).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

71925156 is a wasteful number, since it uses less digits than its factorization.

71925156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1997931 (or 1997926 counting only the distinct ones).

The product of its digits is 18900, while the sum is 36.

The square root of 71925156 is about 8480.8700025410. The cubic root of 71925156 is about 415.8725648247.

The spelling of 71925156 in words is "seventy-one million, nine hundred twenty-five thousand, one hundred fifty-six".