145231700 has 18 divisors (see below), whose sum is σ = 315153006. Its totient is φ = 58092640.

The previous prime is 145231699. The next prime is 145231711. The reversal of 145231700 is 7132541.

It can be written as a sum of positive squares in 3 ways, for example, as 1567504 + 143664196 = 1252^2 + 11986^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 726059 + ... + 726258.

Almost surely, 2^145231700 is an apocalyptic number.

145231700 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

145231700 is an abundant number, since it is smaller than the sum of its proper divisors (169921306).

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

145231700 is a wasteful number, since it uses less digits than its factorization.

145231700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1452331 (or 1452324 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 145231700 is about 12051.2115573497. The cubic root of 145231700 is about 525.6384673691.

The spelling of 145231700 in words is "one hundred forty-five million, two hundred thirty-one thousand, seven hundred".