145323252 has 18 divisors (see below), whose sum is σ = 367344978. Its totient is φ = 48441072.

The previous prime is 145323247. The next prime is 145323281. The reversal of 145323252 is 252323541.

It is a happy number.

145323252 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 145298916 + 24336 = 12054^2 + 156^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×145323252² = 42237695143711008, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2018343 + ... + 2018414.

Almost surely, 2^145323252 is an apocalyptic number.

145323252 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

145323252 is an abundant number, since it is smaller than the sum of its proper divisors (222021726).

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

145323252 is a wasteful number, since it uses less digits than its factorization.

145323252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4036767 (or 4036762 counting only the distinct ones).

The product of its digits is 7200, while the sum is 27.

The square root of 145323252 is about 12055.0094151767. The cubic root of 145323252 is about 525.7488958417.

Adding to 145323252 its reverse (252323541), we get a palindrome (397646793).

The spelling of 145323252 in words is "one hundred forty-five million, three hundred twenty-three thousand, two hundred fifty-two".