145270913 has 4 divisors (see below), whose sum is σ = 148814148. Its totient is φ = 141727680.

The previous prime is 145270861. The next prime is 145270919. The reversal of 145270913 is 319072541.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 73479184 + 71791729 = 8572^2 + 8473^2 .

It is a cyclic number.

It is not a de Polignac number, because 145270913 - 2⁶ = 145270849 is a prime.

It is a super-2 number, since 2×145270913² = 42207276327707138, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 145270913.

It is not an unprimeable number, because it can be changed into a prime (145270919) 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, 1771556 + ... + 1771637.

It is an arithmetic number, because the mean of its divisors is an integer number (37203537).

Almost surely, 2^145270913 is an apocalyptic number.

It is an amenable number.

145270913 is a deficient number, since it is larger than the sum of its proper divisors (3543235).

145270913 is an equidigital number, since it uses as much as digits as its factorization.

145270913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3543234.

The product of its (nonzero) digits is 7560, while the sum is 32.

The square root of 145270913 is about 12052.8383794026. The cubic root of 145270913 is about 525.6857711061.

The spelling of 145270913 in words is "one hundred forty-five million, two hundred seventy thousand, nine hundred thirteen".