145131900 has 36 divisors (see below), whose sum is σ = 419915832. Its totient is φ = 38701760.

The previous prime is 145131869. The next prime is 145131901. The reversal of 145131900 is 9131541.

It is a super-2 number, since 2×145131900² = 42126536795220000, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145131901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 241587 + ... + 242186.

Almost surely, 2^145131900 is an apocalyptic number.

145131900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

145131900 is an abundant number, since it is smaller than the sum of its proper divisors (274783932).

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

145131900 is a wasteful number, since it uses less digits than its factorization.

145131900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 483790 (or 483783 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 24.

The square root of 145131900 is about 12047.0701832437. The cubic root of 145131900 is about 525.5180374175.

The spelling of 145131900 in words is "one hundred forty-five million, one hundred thirty-one thousand, nine hundred".