145131404 has 12 divisors (see below), whose sum is σ = 277069128. Its totient is φ = 65968800.

The previous prime is 145131391. The next prime is 145131419. The reversal of 145131404 is 404131541.

It is a super-2 number, since 2×145131404² = 42126248854022432, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 145131404.

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, 1649177 + ... + 1649264.

It is an arithmetic number, because the mean of its divisors is an integer number (23089094).

Almost surely, 2^145131404 is an apocalyptic number.

It is an amenable number.

145131404 is a deficient number, since it is larger than the sum of its proper divisors (131937724).

145131404 is a wasteful number, since it uses less digits than its factorization.

145131404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3298456 (or 3298454 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 145131404 is about 12047.0495973080. The cubic root of 145131404 is about 525.5174387501.

Adding to 145131404 its reverse (404131541), we get a palindrome (549262945).

The spelling of 145131404 in words is "one hundred forty-five million, one hundred thirty-one thousand, four hundred four".