145425531 has 8 divisors (see below), whose sum is σ = 205306704. Its totient is φ = 91247360.

The previous prime is 145425523. The next prime is 145425547. The reversal of 145425531 is 135524541.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 145425531 - 2³ = 145425523 is a prime.

It is a super-2 number, since 2×145425531² = 42297170133263922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (145425551) 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 7 ways as a sum of consecutive naturals, for example, 1425690 + ... + 1425791.

It is an arithmetic number, because the mean of its divisors is an integer number (25663338).

Almost surely, 2^145425531 is an apocalyptic number.

145425531 is a deficient number, since it is larger than the sum of its proper divisors (59881173).

145425531 is a wasteful number, since it uses less digits than its factorization.

145425531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2851501.

The product of its digits is 12000, while the sum is 30.

The square root of 145425531 is about 12059.2508473785. The cubic root of 145425531 is about 525.8722082052.

The spelling of 145425531 in words is "one hundred forty-five million, four hundred twenty-five thousand, five hundred thirty-one".