157641587 has 4 divisors (see below), whose sum is σ = 159266856. Its totient is φ = 156016320.

The previous prime is 157641503. The next prime is 157641623. The reversal of 157641587 is 785146751.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 157641587 - 2¹⁴ = 157625203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (157641787) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 812489 + ... + 812682.

It is an arithmetic number, because the mean of its divisors is an integer number (39816714).

Almost surely, 2^157641587 is an apocalyptic number.

157641587 is a deficient number, since it is larger than the sum of its proper divisors (1625269).

157641587 is an equidigital number, since it uses as much as digits as its factorization.

157641587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1625268.

The product of its digits is 235200, while the sum is 44.

The square root of 157641587 is about 12555.5400919275. The cubic root of 157641587 is about 540.2029267047.

The spelling of 157641587 in words is "one hundred fifty-seven million, six hundred forty-one thousand, five hundred eighty-seven".