145313252 has 12 divisors (see below), whose sum is σ = 290626560. Its totient is φ = 62277096.

The previous prime is 145313221. The next prime is 145313261. The reversal of 145313252 is 252313541.

It is a happy number.

145313252 is an admirable number.

It is a super-2 number, since 2×145313252² = 42231882413631008, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2594852 + ... + 2594907.

It is an arithmetic number, because the mean of its divisors is an integer number (24218880).

Almost surely, 2^145313252 is an apocalyptic number.

It is an amenable number.

145313252 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

145313252 is a wasteful number, since it uses less digits than its factorization.

145313252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5189770 (or 5189768 counting only the distinct ones).

The product of its digits is 3600, while the sum is 26.

The square root of 145313252 is about 12054.5946427078. The cubic root of 145313252 is about 525.7368362677.

Adding to 145313252 its reverse (252313541), we get a palindrome (397626793).

The spelling of 145313252 in words is "one hundred forty-five million, three hundred thirteen thousand, two hundred fifty-two".