145425440 has 24 divisors (see below), whose sum is σ = 343567980. Its totient is φ = 58170112.

The previous prime is 145425421. The next prime is 145425451. The reversal of 145425440 is 44524541.

It can be written as a sum of positive squares in 2 ways, for example, as 139334416 + 6091024 = 11804^2 + 2468^2 .

It is a super-2 number, since 2×145425440² = 42297117198387200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 454295 + ... + 454614.

Almost surely, 2^145425440 is an apocalyptic number.

145425440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

145425440 is an abundant number, since it is smaller than the sum of its proper divisors (198142540).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

145425440 is an equidigital number, since it uses as much as digits as its factorization.

145425440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 908924 (or 908916 counting only the distinct ones).

The product of its (nonzero) digits is 12800, while the sum is 29.

The square root of 145425440 is about 12059.2470743409. The cubic root of 145425440 is about 525.8720985171.

Adding to 145425440 its reverse (44524541), we get a palindrome (189949981).

The spelling of 145425440 in words is "one hundred forty-five million, four hundred twenty-five thousand, four hundred forty".