139137026 has 16 divisors (see below), whose sum is σ = 244339200. Its totient is φ = 58175520.

The previous prime is 139137023. The next prime is 139137029. The reversal of 139137026 is 620731931.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (139137023) and next prime (139137029).

It is a super-2 number, since 2×139137026² = 38718224008249352, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 139136983 and 139137001.

It is not an unprimeable number, because it can be changed into a prime (139137023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 120626 + ... + 121773.

It is an arithmetic number, because the mean of its divisors is an integer number (15271200).

Almost surely, 2^139137026 is an apocalyptic number.

139137026 is a deficient number, since it is larger than the sum of its proper divisors (105202174).

139137026 is a wasteful number, since it uses less digits than its factorization.

139137026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242449.

The product of its (nonzero) digits is 6804, while the sum is 32.

The square root of 139137026 is about 11795.6358879036. The cubic root of 139137026 is about 518.1803087209.

Adding to 139137026 its reverse (620731931), we get a palindrome (759868957).

The spelling of 139137026 in words is "one hundred thirty-nine million, one hundred thirty-seven thousand, twenty-six".