157735421 has 2 divisors, whose sum is σ = 157735422. Its totient is φ = 157735420.

The previous prime is 157735399. The next prime is 157735439. The reversal of 157735421 is 124537751.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 132595225 + 25140196 = 11515^2 + 5014^2 .

It is a cyclic number.

It is not a de Polignac number, because 157735421 - 2²² = 153541117 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (157735021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78867710 + 78867711.

It is an arithmetic number, because the mean of its divisors is an integer number (78867711).

Almost surely, 2^157735421 is an apocalyptic number.

It is an amenable number.

157735421 is a deficient number, since it is larger than the sum of its proper divisors (1).

157735421 is an equidigital number, since it uses as much as digits as its factorization.

157735421 is an evil number, because the sum of its binary digits is even.

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

The square root of 157735421 is about 12559.2762928443. The cubic root of 157735421 is about 540.3100882482.

The spelling of 157735421 in words is "one hundred fifty-seven million, seven hundred thirty-five thousand, four hundred twenty-one".