138025785 has 16 divisors (see below), whose sum is σ = 232464960. Its totient is φ = 69739200.

The previous prime is 138025757. The next prime is 138025813. The reversal of 138025785 is 587520831.

It is an interprime number because it is at equal distance from previous prime (138025757) and next prime (138025813).

It is not a de Polignac number, because 138025785 - 2⁵ = 138025753 is a prime.

It is a super-2 number, since 2×138025785² = 38102234649732450, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 241866 + ... + 242435.

It is an arithmetic number, because the mean of its divisors is an integer number (14529060).

Almost surely, 2^138025785 is an apocalyptic number.

138025785 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

138025785 is a deficient number, since it is larger than the sum of its proper divisors (94439175).

138025785 is a wasteful number, since it uses less digits than its factorization.

138025785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 484328.

The product of its (nonzero) digits is 67200, while the sum is 39.

The square root of 138025785 is about 11748.4375556922. The cubic root of 138025785 is about 516.7971086996.

The spelling of 138025785 in words is "one hundred thirty-eight million, twenty-five thousand, seven hundred eighty-five".