145277613 has 24 divisors (see below), whose sum is σ = 226758168. Its totient is φ = 89096832.

The previous prime is 145277609. The next prime is 145277623. The reversal of 145277613 is 316772541.

It is a happy number.

145277613 is a `hidden beast` number, since 14 + 5 + 27 + 7 + 613 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 1205604 + 144072009 = 1098^2 + 12003^2 .

It is not a de Polignac number, because 145277613 - 2² = 145277609 is a prime.

It is a super-2 number, since 2×145277613² = 42211169677955538, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145277623) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 35131 + ... + 39047.

It is an arithmetic number, because the mean of its divisors is an integer number (9448257).

Almost surely, 2^145277613 is an apocalyptic number.

145277613 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

145277613 is a deficient number, since it is larger than the sum of its proper divisors (81480555).

145277613 is a wasteful number, since it uses less digits than its factorization.

145277613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4253 (or 4250 counting only the distinct ones).

The product of its digits is 35280, while the sum is 36.

The square root of 145277613 is about 12053.1163190272. The cubic root of 145277613 is about 525.6938526517.

The spelling of 145277613 in words is "one hundred forty-five million, two hundred seventy-seven thousand, six hundred thirteen".