157247801 has 2 divisors, whose sum is σ = 157247802. Its totient is φ = 157247800.

The previous prime is 157247791. The next prime is 157247843. The reversal of 157247801 is 108742751.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 124300201 + 32947600 = 11149^2 + 5740^2 .

It is a cyclic number.

It is not a de Polignac number, because 157247801 - 2⁶ = 157247737 is a prime.

It is not a weakly prime, because it can be changed into another prime (157240801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78623900 + 78623901.

It is an arithmetic number, because the mean of its divisors is an integer number (78623901).

Almost surely, 2^157247801 is an apocalyptic number.

It is an amenable number.

157247801 is a deficient number, since it is larger than the sum of its proper divisors (1).

157247801 is an equidigital number, since it uses as much as digits as its factorization.

157247801 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15680, while the sum is 35.

The square root of 157247801 is about 12539.8485238060. The cubic root of 157247801 is about 539.7527457441.

The spelling of 157247801 in words is "one hundred fifty-seven million, two hundred forty-seven thousand, eight hundred one".