139975 has 12 divisors (see below), whose sum is σ = 189720. Its totient is φ = 101600.

The previous prime is 139969. The next prime is 139981. The reversal of 139975 is 579931.

139975 = T₁₅₄ + T₁₅₅ + ... + T₁₆₄.

It is an interprime number because it is at equal distance from previous prime (139969) and next prime (139981).

It is not a de Polignac number, because 139975 - 2³ = 139967 is a prime.

139975 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 139975.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21 + ... + 529.

It is an arithmetic number, because the mean of its divisors is an integer number (15810).

2¹³⁹⁹⁷⁵ is an apocalyptic number.

139975 is a deficient number, since it is larger than the sum of its proper divisors (49745).

139975 is a wasteful number, since it uses less digits than its factorization.

139975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 530 (or 525 counting only the distinct ones).

The product of its digits is 8505, while the sum is 34.

The square root of 139975 is about 374.1323295306. The cubic root of 139975 is about 51.9218500642.

The spelling of 139975 in words is "one hundred thirty-nine thousand, nine hundred seventy-five".