145872639 has 72 divisors (see below), whose sum is σ = 248976000. Its totient is φ = 82051200.

The previous prime is 145872637. The next prime is 145872653. The reversal of 145872639 is 936278541.

145872639 is a `hidden beast` number, since 1 + 4 + 5 + 8 + 7 + 2 + 639 = 666.

It is not a de Polignac number, because 145872639 - 2¹ = 145872637 is a prime.

It is a super-4 number, since 4×145872639⁴ (a number of 34 digits) contains 4444 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 145872594 and 145872603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145872637) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 978937 + ... + 979085.

It is an arithmetic number, because the mean of its divisors is an integer number (3458000).

Almost surely, 2^145872639 is an apocalyptic number.

145872639 is a deficient number, since it is larger than the sum of its proper divisors (103103361).

145872639 is a wasteful number, since it uses less digits than its factorization.

145872639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237 (or 223 counting only the distinct ones).

The product of its digits is 362880, while the sum is 45.

The square root of 145872639 is about 12077.7745880605. The cubic root of 145872639 is about 526.4105848377.

The spelling of 145872639 in words is "one hundred forty-five million, eight hundred seventy-two thousand, six hundred thirty-nine".