139954841 has 8 divisors (see below), whose sum is σ = 155918280. Its totient is φ = 124733952.

The previous prime is 139954781. The next prime is 139954847. The reversal of 139954841 is 148459931.

It can be written as a sum of positive squares in 4 ways, for example, as 1210000 + 138744841 = 1100^2 + 11779^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 139954841 - 2¹⁸ = 139692697 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 139954792 and 139954801.

It is not an unprimeable number, because it can be changed into a prime (139954847) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 185240 + ... + 185993.

It is an arithmetic number, because the mean of its divisors is an integer number (19489785).

Almost surely, 2^139954841 is an apocalyptic number.

It is an amenable number.

139954841 is a deficient number, since it is larger than the sum of its proper divisors (15963439).

139954841 is a wasteful number, since it uses less digits than its factorization.

139954841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 371275.

The product of its digits is 155520, while the sum is 44.

The square root of 139954841 is about 11830.2510962363. The cubic root of 139954841 is about 519.1935737427.

The spelling of 139954841 in words is "one hundred thirty-nine million, nine hundred fifty-four thousand, eight hundred forty-one".