157854591 has 12 divisors (see below), whose sum is σ = 233315368. Its totient is φ = 102788784.

The previous prime is 157854553. The next prime is 157854661. The reversal of 157854591 is 195458751.

157854591 is a `hidden beast` number, since 1 + 5 + 7 + 8 + 54 + 591 = 666.

It is not a de Polignac number, because 157854591 - 2¹¹ = 157852543 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157854391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 203560 + ... + 204333.

Almost surely, 2^157854591 is an apocalyptic number.

157854591 is a deficient number, since it is larger than the sum of its proper divisors (75460777).

157854591 is a wasteful number, since it uses less digits than its factorization.

157854591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 407942 (or 407939 counting only the distinct ones).

The product of its digits is 252000, while the sum is 45.

The square root of 157854591 is about 12564.0196991250. The cubic root of 157854591 is about 540.4461231017.

It can be divided in two parts, 1578 and 54591, that added together give a square (56169 = 237²).

The spelling of 157854591 in words is "one hundred fifty-seven million, eight hundred fifty-four thousand, five hundred ninety-one".