121654451 has 4 divisors (see below), whose sum is σ = 123949872. Its totient is φ = 119359032.

The previous prime is 121654417. The next prime is 121654487. The reversal of 121654451 is 154456121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 121654451 - 2⁶ = 121654387 is a prime.

It is a super-2 number, since 2×121654451² = 29599610896222802, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121654411) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1147631 + ... + 1147736.

It is an arithmetic number, because the mean of its divisors is an integer number (30987468).

Almost surely, 2^121654451 is an apocalyptic number.

121654451 is a deficient number, since it is larger than the sum of its proper divisors (2295421).

121654451 is an equidigital number, since it uses as much as digits as its factorization.

121654451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2295420.

The product of its digits is 4800, while the sum is 29.

The square root of 121654451 is about 11029.7076570506. The cubic root of 121654451 is about 495.4988692353.

The spelling of 121654451 in words is "one hundred twenty-one million, six hundred fifty-four thousand, four hundred fifty-one".