145557986 has 16 divisors (see below), whose sum is σ = 250231680. Its totient is φ = 62206080.

The previous prime is 145557983. The next prime is 145557991. The reversal of 145557986 is 689755541.

It is not an unprimeable number, because it can be changed into a prime (145557983) 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, 9455 + ... + 19506.

It is an arithmetic number, because the mean of its divisors is an integer number (15639480).

Almost surely, 2^145557986 is an apocalyptic number.

145557986 is a deficient number, since it is larger than the sum of its proper divisors (104673694).

145557986 is a wasteful number, since it uses less digits than its factorization.

145557986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29329.

The product of its digits is 1512000, while the sum is 50.

The square root of 145557986 is about 12064.7414394176. The cubic root of 145557986 is about 526.0318162792.

The spelling of 145557986 in words is "one hundred forty-five million, five hundred fifty-seven thousand, nine hundred eighty-six".