157749841 has 4 divisors (see below), whose sum is σ = 157864000. Its totient is φ = 157635684.

The previous prime is 157749811. The next prime is 157749853. The reversal of 157749841 is 148947751.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 157749841 - 2⁹ = 157749329 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 157749791 and 157749800.

It is not an unprimeable number, because it can be changed into a prime (157749811) 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, 54981 + ... + 57778.

It is an arithmetic number, because the mean of its divisors is an integer number (39466000).

Almost surely, 2^157749841 is an apocalyptic number.

It is an amenable number.

157749841 is a deficient number, since it is larger than the sum of its proper divisors (114159).

157749841 is a wasteful number, since it uses less digits than its factorization.

157749841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114158.

The product of its digits is 282240, while the sum is 46.

The square root of 157749841 is about 12559.8503573888. The cubic root of 157749841 is about 540.3265525993.

The spelling of 157749841 in words is "one hundred fifty-seven million, seven hundred forty-nine thousand, eight hundred forty-one".