121536451 has 8 divisors (see below), whose sum is σ = 130499424. Its totient is φ = 112775040.

The previous prime is 121536449. The next prime is 121536497. The reversal of 121536451 is 154635121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 121536451 - 2¹ = 121536449 is a prime.

It is a super-2 number, since 2×121536451² = 29542217843350802, which contains 22 as substring.

It is a Duffinian number.

It is a zygodrome in base 2.

It is not an unprimeable number, because it can be changed into a prime (121536551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49140 + ... + 51553.

It is an arithmetic number, because the mean of its divisors is an integer number (16312428).

Almost surely, 2^121536451 is an apocalyptic number.

121536451 is a deficient number, since it is larger than the sum of its proper divisors (8962973).

121536451 is a wasteful number, since it uses less digits than its factorization.

121536451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100781.

The product of its digits is 3600, while the sum is 28.

The square root of 121536451 is about 11024.3571694680. The cubic root of 121536451 is about 495.3386126494.

The spelling of 121536451 in words is "one hundred twenty-one million, five hundred thirty-six thousand, four hundred fifty-one".