139497265 has 8 divisors (see below), whose sum is σ = 169278120. Its totient is φ = 110343552.

The previous prime is 139497247. The next prime is 139497311. The reversal of 139497265 is 562794931.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 21492496 + 118004769 = 4636^2 + 10863^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 139497265 - 2¹³ = 139489073 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 156294 + ... + 157183.

It is an arithmetic number, because the mean of its divisors is an integer number (21159765).

Almost surely, 2^139497265 is an apocalyptic number.

It is an amenable number.

139497265 is a deficient number, since it is larger than the sum of its proper divisors (29780855).

139497265 is an equidigital number, since it uses as much as digits as its factorization.

139497265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 313571.

The product of its digits is 408240, while the sum is 46.

The square root of 139497265 is about 11810.8960286678. The cubic root of 139497265 is about 518.6271293645.

The spelling of 139497265 in words is "one hundred thirty-nine million, four hundred ninety-seven thousand, two hundred sixty-five".