145031425 has 72 divisors (see below), whose sum is σ = 234092160. Its totient is φ = 88099200.

The previous prime is 145031417. The next prime is 145031431. The reversal of 145031425 is 524130541.

It is a happy number.

It is not a de Polignac number, because 145031425 - 2³ = 145031417 is a prime.

It is a super-2 number, since 2×145031425² = 42068228475061250, which contains 22 as substring.

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

It is a self number, because there is not a number n which added to its sum of digits gives 145031425.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 633211 + ... + 633439.

It is an arithmetic number, because the mean of its divisors is an integer number (3251280).

Almost surely, 2^145031425 is an apocalyptic number.

It is an amenable number.

145031425 is a deficient number, since it is larger than the sum of its proper divisors (89060735).

145031425 is a wasteful number, since it uses less digits than its factorization.

145031425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311 (or 299 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 145031425 is about 12042.8993602039. The cubic root of 145031425 is about 525.3967371513.

Adding to 145031425 its reverse (524130541), we get a palindrome (669161966).

The spelling of 145031425 in words is "one hundred forty-five million, thirty-one thousand, four hundred twenty-five".