157490905 has 32 divisors (see below), whose sum is σ = 233735040. Its totient is φ = 100154880.

The previous prime is 157490903. The next prime is 157490911. The reversal of 157490905 is 509094751.

It is not a de Polignac number, because 157490905 - 2¹ = 157490903 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (157490903) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7789 + ... + 19381.

It is an arithmetic number, because the mean of its divisors is an integer number (7304220).

Almost surely, 2^157490905 is an apocalyptic number.

It is an amenable number.

157490905 is a deficient number, since it is larger than the sum of its proper divisors (76244135).

157490905 is a wasteful number, since it uses less digits than its factorization.

157490905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11641.

The product of its (nonzero) digits is 56700, while the sum is 40.

The square root of 157490905 is about 12549.5380393065. The cubic root of 157490905 is about 540.0307538498.

The spelling of 157490905 in words is "one hundred fifty-seven million, four hundred ninety thousand, nine hundred five".