23121572 has 6 divisors (see below), whose sum is σ = 40462758. Its totient is φ = 11560784.

The previous prime is 23121557. The next prime is 23121583. The reversal of 23121572 is 27512132.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 22052416 + 1069156 = 4696^2 + 1034^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2890193 + ... + 2890200.

It is an arithmetic number, because the mean of its divisors is an integer number (6743793).

Almost surely, 2^23121572 is an apocalyptic number.

It is an amenable number.

23121572 is a deficient number, since it is larger than the sum of its proper divisors (17341186).

23121572 is a wasteful number, since it uses less digits than its factorization.

23121572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5780397 (or 5780395 counting only the distinct ones).

The product of its digits is 840, while the sum is 23.

The square root of 23121572 is about 4808.4895757400. The cubic root of 23121572 is about 284.8868823688.

The spelling of 23121572 in words is "twenty-three million, one hundred twenty-one thousand, five hundred seventy-two".