139756545 has 24 divisors (see below), whose sum is σ = 246355200. Its totient is φ = 73272096.

The previous prime is 139756537. The next prime is 139756559. The reversal of 139756545 is 545657931.

139756545 is a `hidden beast` number, since 1 + 39 + 75 + 6 + 545 = 666.

It is not a de Polignac number, because 139756545 - 2³ = 139756537 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 139756545.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 23665 + ... + 28974.

It is an arithmetic number, because the mean of its divisors is an integer number (10264800).

Almost surely, 2^139756545 is an apocalyptic number.

139756545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

139756545 is a deficient number, since it is larger than the sum of its proper divisors (106598655).

139756545 is a wasteful number, since it uses less digits than its factorization.

139756545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52709 (or 52706 counting only the distinct ones).

The product of its digits is 567000, while the sum is 45.

The square root of 139756545 is about 11821.8672383004. The cubic root of 139756545 is about 518.9482501555.

The spelling of 139756545 in words is "one hundred thirty-nine million, seven hundred fifty-six thousand, five hundred forty-five".