157921741 has 6 divisors (see below), whose sum is σ = 160610442. Its totient is φ = 155236320.

The previous prime is 157921697. The next prime is 157921783. The reversal of 157921741 is 147129751.

It can be written as a sum of positive squares in 3 ways, for example, as 69655716 + 88266025 = 8346^2 + 9395^2 .

It is not a de Polignac number, because 157921741 - 2¹³ = 157913549 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 157921741.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157921541) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 97345 + ... + 98953.

It is an arithmetic number, because the mean of its divisors is an integer number (26768407).

Almost surely, 2^157921741 is an apocalyptic number.

It is an amenable number.

157921741 is a deficient number, since it is larger than the sum of its proper divisors (2688701).

157921741 is an frugal number, since it uses more digits than its factorization.

157921741 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3279 (or 1670 counting only the distinct ones).

The product of its digits is 17640, while the sum is 37.

The square root of 157921741 is about 12566.6917285338. The cubic root of 157921741 is about 540.5227459654.

The spelling of 157921741 in words is "one hundred fifty-seven million, nine hundred twenty-one thousand, seven hundred forty-one".