151457921 has 8 divisors (see below), whose sum is σ = 158608320. Its totient is φ = 144354672.

The previous prime is 151457903. The next prime is 151457927. The reversal of 151457921 is 129754151.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 151457921 - 2⁶ = 151457857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (151457927) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5126 + ... + 18143.

It is an arithmetic number, because the mean of its divisors is an integer number (19826040).

Almost surely, 2^151457921 is an apocalyptic number.

It is an amenable number.

151457921 is a deficient number, since it is larger than the sum of its proper divisors (7150399).

151457921 is a wasteful number, since it uses less digits than its factorization.

151457921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23575.

The product of its digits is 12600, while the sum is 35.

The square root of 151457921 is about 12306.8241638532. The cubic root of 151457921 is about 533.0451510385.

The spelling of 151457921 in words is "one hundred fifty-one million, four hundred fifty-seven thousand, nine hundred twenty-one".