145275639 has 8 divisors (see below), whose sum is σ = 195698160. Its totient is φ = 95851776.

The previous prime is 145275623. The next prime is 145275643. The reversal of 145275639 is 936572541.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 145275639 - 2⁴ = 145275623 is a prime.

It is a super-2 number, since 2×145275639² = 42210022573716642, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 145275639.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145275139) 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, 249324 + ... + 249905.

It is an arithmetic number, because the mean of its divisors is an integer number (24462270).

Almost surely, 2^145275639 is an apocalyptic number.

145275639 is a deficient number, since it is larger than the sum of its proper divisors (50422521).

145275639 is an equidigital number, since it uses as much as digits as its factorization.

145275639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 499329.

The product of its digits is 226800, while the sum is 42.

The square root of 145275639 is about 12053.0344312127. The cubic root of 145275639 is about 525.6914716370.

The spelling of 145275639 in words is "one hundred forty-five million, two hundred seventy-five thousand, six hundred thirty-nine".