157174421 has 2 divisors, whose sum is σ = 157174422. Its totient is φ = 157174420.

The previous prime is 157174411. The next prime is 157174447. The reversal of 157174421 is 124471751.

157174421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 153016900 + 4157521 = 12370^2 + 2039^2 .

It is a cyclic number.

It is not a de Polignac number, because 157174421 - 2¹⁰ = 157173397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (157174411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78587210 + 78587211.

It is an arithmetic number, because the mean of its divisors is an integer number (78587211).

Almost surely, 2^157174421 is an apocalyptic number.

It is an amenable number.

157174421 is a deficient number, since it is larger than the sum of its proper divisors (1).

157174421 is an equidigital number, since it uses as much as digits as its factorization.

157174421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7840, while the sum is 32.

The square root of 157174421 is about 12536.9223097218. The cubic root of 157174421 is about 539.6687737824.

The spelling of 157174421 in words is "one hundred fifty-seven million, one hundred seventy-four thousand, four hundred twenty-one".