145251025 has 12 divisors (see below), whose sum is σ = 180261900. Its totient is φ = 116103680.

The previous prime is 145251023. The next prime is 145251047. The reversal of 145251025 is 520152541.

It can be written as a sum of positive squares in 6 ways, for example, as 96721 + 145154304 = 311^2 + 12048^2 .

It is not a de Polignac number, because 145251025 - 2¹ = 145251023 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145251023) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 51861 + ... + 54589.

It is an arithmetic number, because the mean of its divisors is an integer number (15021825).

Almost surely, 2^145251025 is an apocalyptic number.

It is an amenable number.

145251025 is a deficient number, since it is larger than the sum of its proper divisors (35010875).

145251025 is a wasteful number, since it uses less digits than its factorization.

145251025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4868 (or 4863 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 25.

The square root of 145251025 is about 12052.0133172844. The cubic root of 145251025 is about 525.6617807203.

The spelling of 145251025 in words is "one hundred forty-five million, two hundred fifty-one thousand, twenty-five".