121557146 has 8 divisors (see below), whose sum is σ = 182424960. Its totient is φ = 60748828.

The previous prime is 121557133. The next prime is 121557187. The reversal of 121557146 is 641755121.

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

It is a super-2 number, since 2×121557146² = 29552279487330632, which contains 22 as substring.

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, 9356 + ... + 18183.

It is an arithmetic number, because the mean of its divisors is an integer number (22803120).

Almost surely, 2^121557146 is an apocalyptic number.

121557146 is a deficient number, since it is larger than the sum of its proper divisors (60867814).

121557146 is a wasteful number, since it uses less digits than its factorization.

121557146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29748.

The product of its digits is 8400, while the sum is 32.

The square root of 121557146 is about 11025.2957329951. The cubic root of 121557146 is about 495.3667261652.

The spelling of 121557146 in words is "one hundred twenty-one million, five hundred fifty-seven thousand, one hundred forty-six".