157249986 has 16 divisors (see below), whose sum is σ = 319831200. Its totient is φ = 51528128.

The previous prime is 157249979. The next prime is 157249987. The reversal of 157249986 is 689942751.

157249986 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (157249987) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 221751 + ... + 222458.

It is an arithmetic number, because the mean of its divisors is an integer number (19989450).

Almost surely, 2^157249986 is an apocalyptic number.

157249986 is an abundant number, since it is smaller than the sum of its proper divisors (162581214).

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

157249986 is a wasteful number, since it uses less digits than its factorization.

157249986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 444273.

The product of its digits is 1088640, while the sum is 51.

The square root of 157249986 is about 12539.9356457679. The cubic root of 157249986 is about 539.7552457352.

The spelling of 157249986 in words is "one hundred fifty-seven million, two hundred forty-nine thousand, nine hundred eighty-six".