121470157 has 4 divisors (see below), whose sum is σ = 121744800. Its totient is φ = 121195516.

The previous prime is 121470133. The next prime is 121470161. The reversal of 121470157 is 751074121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121470157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121470187) 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, 136657 + ... + 137542.

It is an arithmetic number, because the mean of its divisors is an integer number (30436200).

Almost surely, 2^121470157 is an apocalyptic number.

It is an amenable number.

121470157 is a deficient number, since it is larger than the sum of its proper divisors (274643).

121470157 is an equidigital number, since it uses as much as digits as its factorization.

121470157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274642.

The product of its (nonzero) digits is 1960, while the sum is 28.

The square root of 121470157 is about 11021.3500534190. The cubic root of 121470157 is about 495.2485328141.

The spelling of 121470157 in words is "one hundred twenty-one million, four hundred seventy thousand, one hundred fifty-seven".