157427021 has 8 divisors (see below), whose sum is σ = 172065024. Its totient is φ = 143386560.

The previous prime is 157427009. The next prime is 157427029. The reversal of 157427021 is 120724751.

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 157427021 - 2²⁶ = 90318157 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157427029) 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, 148835 + ... + 149888.

It is an arithmetic number, because the mean of its divisors is an integer number (21508128).

Almost surely, 2^157427021 is an apocalyptic number.

It is an amenable number.

157427021 is a deficient number, since it is larger than the sum of its proper divisors (14638003).

157427021 is a wasteful number, since it uses less digits than its factorization.

157427021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 298771.

The product of its (nonzero) digits is 3920, while the sum is 29.

The square root of 157427021 is about 12546.9925081670. The cubic root of 157427021 is about 539.9577253142.

The spelling of 157427021 in words is "one hundred fifty-seven million, four hundred twenty-seven thousand, twenty-one".