139994571 has 32 divisors (see below), whose sum is σ = 199402560. Its totient is φ = 87220224.

The previous prime is 139994567. The next prime is 139994579. The reversal of 139994571 is 175499931.

It is not a de Polignac number, because 139994571 - 2² = 139994567 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 139994571.

It is not an unprimeable number, because it can be changed into a prime (139994579) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 447111 + ... + 447423.

It is an arithmetic number, because the mean of its divisors is an integer number (6231330).

Almost surely, 2^139994571 is an apocalyptic number.

139994571 is a deficient number, since it is larger than the sum of its proper divisors (59407989).

139994571 is a wasteful number, since it uses less digits than its factorization.

139994571 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 495.

The product of its digits is 306180, while the sum is 48.

The square root of 139994571 is about 11831.9301468526. The cubic root of 139994571 is about 519.2426981816.

The spelling of 139994571 in words is "one hundred thirty-nine million, nine hundred ninety-four thousand, five hundred seventy-one".