138461401 has 4 divisors (see below), whose sum is σ = 149112292. Its totient is φ = 127810512.

The previous prime is 138461371. The next prime is 138461423. The reversal of 138461401 is 104164831.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 58537801 + 79923600 = 7651^2 + 8940^2 .

It is a cyclic number.

It is not a de Polignac number, because 138461401 - 2¹⁷ = 138330329 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 138461401.

It is not an unprimeable number, because it can be changed into a prime (138461441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5325426 + ... + 5325451.

It is an arithmetic number, because the mean of its divisors is an integer number (37278073).

Almost surely, 2^138461401 is an apocalyptic number.

It is an amenable number.

138461401 is a deficient number, since it is larger than the sum of its proper divisors (10650891).

138461401 is a wasteful number, since it uses less digits than its factorization.

138461401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10650890.

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 138461401 is about 11766.9622672974. The cubic root of 138461401 is about 517.3402165653.

The spelling of 138461401 in words is "one hundred thirty-eight million, four hundred sixty-one thousand, four hundred one".