145131786 has 12 divisors (see below), whose sum is σ = 314452242. Its totient is φ = 48377256.

The previous prime is 145131781. The next prime is 145131803. The reversal of 145131786 is 687131541.

It can be written as a sum of positive squares in only one way, i.e., 124746561 + 20385225 = 11169^2 + 4515^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 145131786.

It is not an unprimeable number, because it can be changed into a prime (145131781) 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, 4031421 + ... + 4031456.

Almost surely, 2^145131786 is an apocalyptic number.

145131786 is an abundant number, since it is smaller than the sum of its proper divisors (169320456).

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

145131786 is a wasteful number, since it uses less digits than its factorization.

145131786 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8062885 (or 8062882 counting only the distinct ones).

The product of its digits is 20160, while the sum is 36.

The square root of 145131786 is about 12047.0654518019. The cubic root of 145131786 is about 525.5178998207.

The spelling of 145131786 in words is "one hundred forty-five million, one hundred thirty-one thousand, seven hundred eighty-six".