145421232 has 40 divisors (see below), whose sum is σ = 409824960. Its totient is φ = 44066880.

The previous prime is 145421197. The next prime is 145421233. The reversal of 145421232 is 232124541.

145421232 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×145421232² = 42294669432795648, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (145421233) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 137182 + ... + 138237.

It is an arithmetic number, because the mean of its divisors is an integer number (10245624).

Almost surely, 2^145421232 is an apocalyptic number.

145421232 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

145421232 is an abundant number, since it is smaller than the sum of its proper divisors (264403728).

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

145421232 is a wasteful number, since it uses less digits than its factorization.

145421232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275441 (or 275435 counting only the distinct ones).

The product of its digits is 1920, while the sum is 24.

The square root of 145421232 is about 12059.0726011580. The cubic root of 145421232 is about 525.8670262933.

Adding to 145421232 its reverse (232124541), we get a palindrome (377545773).

The spelling of 145421232 in words is "one hundred forty-five million, four hundred twenty-one thousand, two hundred thirty-two".