139665532 has 12 divisors (see below), whose sum is σ = 246174040. Its totient is φ = 69330096.

The previous prime is 139665517. The next prime is 139665551. The reversal of 139665532 is 235566931.

It is a happy number.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 125043 + ... + 126154.

Almost surely, 2^139665532 is an apocalyptic number.

It is an amenable number.

139665532 is a deficient number, since it is larger than the sum of its proper divisors (106508508).

139665532 is a wasteful number, since it uses less digits than its factorization.

139665532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251340 (or 251338 counting only the distinct ones).

The product of its digits is 145800, while the sum is 40.

The square root of 139665532 is about 11818.0172617914. The cubic root of 139665532 is about 518.8355749472.

The spelling of 139665532 in words is "one hundred thirty-nine million, six hundred sixty-five thousand, five hundred thirty-two".