16121552 has 10 divisors (see below), whose sum is σ = 31235538. Its totient is φ = 8060768.

The previous prime is 16121537. The next prime is 16121561. The reversal of 16121552 is 25512161.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 10995856 + 5125696 = 3316^2 + 2264^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 503783 + ... + 503814.

Almost surely, 2^16121552 is an apocalyptic number.

It is an amenable number.

16121552 is a deficient number, since it is larger than the sum of its proper divisors (15113986).

16121552 is a wasteful number, since it uses less digits than its factorization.

16121552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1007605 (or 1007599 counting only the distinct ones).

The product of its digits is 600, while the sum is 23.

The square root of 16121552 is about 4015.1652518919. The cubic root of 16121552 is about 252.6207088768.

The spelling of 16121552 in words is "sixteen million, one hundred twenty-one thousand, five hundred fifty-two".