151420657 has 4 divisors (see below), whose sum is σ = 151592256. Its totient is φ = 151249060.

The previous prime is 151420637. The next prime is 151420663. The reversal of 151420657 is 756024151.

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, and also an emirpimes, since its reverse is a distinct semiprime: 756024151 = 43 ⋅17581957.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-151420657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (151420627) 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, 84469 + ... + 86242.

It is an arithmetic number, because the mean of its divisors is an integer number (37898064).

Almost surely, 2^151420657 is an apocalyptic number.

It is an amenable number.

151420657 is a deficient number, since it is larger than the sum of its proper divisors (171599).

151420657 is an equidigital number, since it uses as much as digits as its factorization.

151420657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171598.

The product of its (nonzero) digits is 8400, while the sum is 31.

The square root of 151420657 is about 12305.3101139305. The cubic root of 151420657 is about 533.0014314724.

The spelling of 151420657 in words is "one hundred fifty-one million, four hundred twenty thousand, six hundred fifty-seven".