145281725 has 12 divisors (see below), whose sum is σ = 180375360. Its totient is φ = 116079600.

The previous prime is 145281709. The next prime is 145281757. The reversal of 145281725 is 527182541.

145281725 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 145281725 - 2⁴ = 145281709 is a prime.

It is a super-2 number, since 2×145281725² = 42213559237951250, 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 11 ways as a sum of consecutive naturals, for example, 19586 + ... + 25964.

It is an arithmetic number, because the mean of its divisors is an integer number (15031280).

Almost surely, 2^145281725 is an apocalyptic number.

It is an amenable number.

145281725 is a deficient number, since it is larger than the sum of its proper divisors (35093635).

145281725 is an equidigital number, since it uses as much as digits as its factorization.

145281725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7300 (or 7295 counting only the distinct ones).

The product of its digits is 22400, while the sum is 35.

The square root of 145281725 is about 12053.2868961126. The cubic root of 145281725 is about 525.6988124265.

The spelling of 145281725 in words is "one hundred forty-five million, two hundred eighty-one thousand, seven hundred twenty-five".