157421753 has 8 divisors (see below), whose sum is σ = 164512128. Its totient is φ = 150487344.

The previous prime is 157421743. The next prime is 157421767. The reversal of 157421753 is 357124751.

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 157421753 - 2¹² = 157417657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (157421743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36926 + ... + 40967.

It is an arithmetic number, because the mean of its divisors is an integer number (20564016).

Almost surely, 2^157421753 is an apocalyptic number.

It is an amenable number.

157421753 is a deficient number, since it is larger than the sum of its proper divisors (7090375).

157421753 is an equidigital number, since it uses as much as digits as its factorization.

157421753 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77983.

The product of its digits is 29400, while the sum is 35.

The square root of 157421753 is about 12546.7825756247. The cubic root of 157421753 is about 539.9517023562.

The spelling of 157421753 in words is "one hundred fifty-seven million, four hundred twenty-one thousand, seven hundred fifty-three".