138462161 has 4 divisors (see below), whose sum is σ = 146607012. Its totient is φ = 130317312.

The previous prime is 138462119. The next prime is 138462187. The reversal of 138462161 is 161264831.

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 120450625 + 18011536 = 10975^2 + 4244^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-138462161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138462661) 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, 4072400 + ... + 4072433.

It is an arithmetic number, because the mean of its divisors is an integer number (36651753).

Almost surely, 2^138462161 is an apocalyptic number.

It is an amenable number.

138462161 is a deficient number, since it is larger than the sum of its proper divisors (8144851).

138462161 is an equidigital number, since it uses as much as digits as its factorization.

138462161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8144850.

The product of its digits is 6912, while the sum is 32.

The square root of 138462161 is about 11766.9945610593. The cubic root of 138462161 is about 517.3411631055.

The spelling of 138462161 in words is "one hundred thirty-eight million, four hundred sixty-two thousand, one hundred sixty-one".