45139047 has 16 divisors (see below), whose sum is σ = 61213152. Its totient is φ = 29583360.

The previous prime is 45139043. The next prime is 45139049. The reversal of 45139047 is 74093154.

It is not a de Polignac number, because 45139047 - 2² = 45139043 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 45138999 and 45139017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45139043) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52243 + ... + 53099.

It is an arithmetic number, because the mean of its divisors is an integer number (3825822).

Almost surely, 2^45139047 is an apocalyptic number.

45139047 is a deficient number, since it is larger than the sum of its proper divisors (16074105).

45139047 is a wasteful number, since it uses less digits than its factorization.

45139047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1138.

The product of its (nonzero) digits is 15120, while the sum is 33.

The square root of 45139047 is about 6718.5598903336. The cubic root of 45139047 is about 356.0553058670.

The spelling of 45139047 in words is "forty-five million, one hundred thirty-nine thousand, forty-seven".