145931000 has 32 divisors (see below), whose sum is σ = 341480880. Its totient is φ = 58372000.

The previous prime is 145930999. The next prime is 145931017. The reversal of 145931000 is 139541.

It is a happy number.

It is a super-2 number, since 2×145931000² = 42591713522000000, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71966 + ... + 73965.

Almost surely, 2^145931000 is an apocalyptic number.

145931000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

145931000 is an abundant number, since it is smaller than the sum of its proper divisors (195549880).

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

145931000 is a wasteful number, since it uses less digits than its factorization.

145931000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145952 (or 145938 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 145931000 is about 12080.1903958506. The cubic root of 145931000 is about 526.4807779235.

The spelling of 145931000 in words is "one hundred forty-five million, nine hundred thirty-one thousand".