121372154 has 8 divisors (see below), whose sum is σ = 183728820. Its totient is φ = 60129216.

The previous prime is 121372117. The next prime is 121372169. The reversal of 121372154 is 451273121.

It can be written as a sum of positive squares in 2 ways, for example, as 112933129 + 8439025 = 10627^2 + 2905^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 278159 + ... + 278594.

Almost surely, 2^121372154 is an apocalyptic number.

121372154 is a deficient number, since it is larger than the sum of its proper divisors (62356666).

121372154 is a wasteful number, since it uses less digits than its factorization.

121372154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 556864.

The product of its digits is 1680, while the sum is 26.

The square root of 121372154 is about 11016.9031038673. The cubic root of 121372154 is about 495.1153069474.

The spelling of 121372154 in words is "one hundred twenty-one million, three hundred seventy-two thousand, one hundred fifty-four".