145215040 has 28 divisors (see below), whose sum is σ = 345794076. Its totient is φ = 58085888.

The previous prime is 145215019. The next prime is 145215089. The reversal of 145215040 is 40512541.

It can be written as a sum of positive squares in 2 ways, for example, as 77580864 + 67634176 = 8808^2 + 8224^2 .

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, 226579 + ... + 227218.

Almost surely, 2^145215040 is an apocalyptic number.

145215040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

145215040 is an abundant number, since it is smaller than the sum of its proper divisors (200579036).

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

145215040 is an equidigital number, since it uses as much as digits as its factorization.

145215040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 453814 (or 453804 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 145215040 is about 12050.5203207164. The cubic root of 145215040 is about 525.6183673686.

Adding to 145215040 its reverse (40512541), we get a palindrome (185727581).

The spelling of 145215040 in words is "one hundred forty-five million, two hundred fifteen thousand, forty".