121457152 has 40 divisors (see below), whose sum is σ = 244439712. Its totient is φ = 60288000.

The previous prime is 121457123. The next prime is 121457153. The reversal of 121457152 is 251754121.

It is a super-2 number, since 2×121457152² = 29503679543902208, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 121457152.

It is not an unprimeable number, because it can be changed into a prime (121457153) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 76527 + ... + 78097.

Almost surely, 2^121457152 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121457152, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (122219856).

121457152 is an abundant number, since it is smaller than the sum of its proper divisors (122982560).

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

121457152 is an equidigital number, since it uses as much as digits as its factorization.

121457152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1740 (or 1724 counting only the distinct ones).

The product of its digits is 2800, while the sum is 28.

The square root of 121457152 is about 11020.7600463852. The cubic root of 121457152 is about 495.2308578636.

The spelling of 121457152 in words is "one hundred twenty-one million, four hundred fifty-seven thousand, one hundred fifty-two".