145252313 has 4 divisors (see below), whose sum is σ = 146396160. Its totient is φ = 144108468.

The previous prime is 145252273. The next prime is 145252333. The reversal of 145252313 is 313252541.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 145252313 - 2⁸ = 145252057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145252333) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 571733 + ... + 571986.

It is an arithmetic number, because the mean of its divisors is an integer number (36599040).

Almost surely, 2^145252313 is an apocalyptic number.

It is an amenable number.

145252313 is a deficient number, since it is larger than the sum of its proper divisors (1143847).

145252313 is a wasteful number, since it uses less digits than its factorization.

145252313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1143846.

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

The square root of 145252313 is about 12052.0667522214. The cubic root of 145252313 is about 525.6633344680.

The spelling of 145252313 in words is "one hundred forty-five million, two hundred fifty-two thousand, three hundred thirteen".