145091900 has 18 divisors (see below), whose sum is σ = 314849640. Its totient is φ = 58036720.

The previous prime is 145091861. The next prime is 145091909. The reversal of 145091900 is 9190541.

It is a super-2 number, since 2×145091900² = 42103318891220000, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145091909) 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, 725360 + ... + 725559.

Almost surely, 2^145091900 is an apocalyptic number.

145091900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

145091900 is an abundant number, since it is smaller than the sum of its proper divisors (169757740).

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

145091900 is a wasteful number, since it uses less digits than its factorization.

145091900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1450933 (or 1450926 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 29.

The square root of 145091900 is about 12045.4099141540. The cubic root of 145091900 is about 525.4697534015.

The spelling of 145091900 in words is "one hundred forty-five million, ninety-one thousand, nine hundred".