157240 has 16 divisors (see below), whose sum is σ = 353880. Its totient is φ = 62880.

The previous prime is 157231. The next prime is 157243. The reversal of 157240 is 42751.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157243) by changing a digit.

157240 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1926 + ... + 2005.

2¹⁵⁷²⁴⁰ is an apocalyptic number.

157240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

157240 is an abundant number, since it is smaller than the sum of its proper divisors (196640).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

157240 is a wasteful number, since it uses less digits than its factorization.

157240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3942 (or 3938 counting only the distinct ones).

The product of its (nonzero) digits is 280, while the sum is 19.

The square root of 157240 is about 396.5349921508. The cubic root of 157240 is about 53.9743819958.

Adding to 157240 its reverse (42751), we get a palindrome (199991).

The spelling of 157240 in words is "one hundred fifty-seven thousand, two hundred forty".