145372725 has 30 divisors (see below), whose sum is σ = 269284290. Its totient is φ = 77531040.

The previous prime is 145372697. The next prime is 145372727. The reversal of 145372725 is 527273541.

It can be written as a sum of positive squares in 3 ways, for example, as 5731236 + 139641489 = 2394^2 + 11817^2 .

It is not a de Polignac number, because 145372725 - 2⁷ = 145372597 is a prime.

It is a super-2 number, since 2×145372725² = 42266458347851250, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 145372725.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145372727) 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 29 ways as a sum of consecutive naturals, for example, 33870 + ... + 37919.

It is an arithmetic number, because the mean of its divisors is an integer number (8976143).

Almost surely, 2^145372725 is an apocalyptic number.

145372725 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

145372725 is a deficient number, since it is larger than the sum of its proper divisors (123911565).

145372725 is an equidigital number, since it uses as much as digits as its factorization.

145372725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71811 (or 71797 counting only the distinct ones).

The product of its digits is 58800, while the sum is 36.

The square root of 145372725 is about 12057.0612091007. The cubic root of 145372725 is about 525.8085500350.

The spelling of 145372725 in words is "one hundred forty-five million, three hundred seventy-two thousand, seven hundred twenty-five".