45139945 has 8 divisors (see below), whose sum is σ = 54204480. Its totient is φ = 36087600.

The previous prime is 45139943. The next prime is 45139951. The reversal of 45139945 is 54993154.

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

It is not a de Polignac number, because 45139945 - 2¹ = 45139943 is a prime.

It is a super-2 number, since 2×45139945² = 4075229269206050, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 45139898 and 45139907.

It is not an unprimeable number, because it can be changed into a prime (45139943) 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, 10986 + ... + 14524.

It is an arithmetic number, because the mean of its divisors is an integer number (6775560).

Almost surely, 2^45139945 is an apocalyptic number.

It is an amenable number.

45139945 is a deficient number, since it is larger than the sum of its proper divisors (9064535).

45139945 is a wasteful number, since it uses less digits than its factorization.

45139945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6095.

The product of its digits is 97200, while the sum is 40.

The square root of 45139945 is about 6718.6267197992. The cubic root of 45139945 is about 356.0576669828.

The spelling of 45139945 in words is "forty-five million, one hundred thirty-nine thousand, nine hundred forty-five".