152121856 has 20 divisors (see below), whose sum is σ = 303947622. Its totient is φ = 76060672.

The previous prime is 152121829. The next prime is 152121859. The reversal of 152121856 is 658121251.

It can be written as a sum of positive squares in only one way, i.e., 125081856 + 27040000 = 11184^2 + 5200^2 .

It is not an unprimeable number, because it can be changed into a prime (152121859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 148045 + ... + 149068.

Almost surely, 2^152121856 is an apocalyptic number.

152121856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

152121856 is a deficient number, since it is larger than the sum of its proper divisors (151825766).

152121856 is an frugal number, since it uses more digits than its factorization.

152121856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 297131 (or 297115 counting only the distinct ones).

The product of its digits is 4800, while the sum is 31.

The square root of 152121856 is about 12333.7689292446. The cubic root of 152121856 is about 533.8229060154.

The spelling of 152121856 in words is "one hundred fifty-two million, one hundred twenty-one thousand, eight hundred fifty-six".