139642341 has 4 divisors (see below), whose sum is σ = 186189792. Its totient is φ = 93094892.

The previous prime is 139642339. The next prime is 139642387. The reversal of 139642341 is 143246931.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 143246931 = 3 ⋅47748977.

It is a cyclic number.

It is not a de Polignac number, because 139642341 - 2¹ = 139642339 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139642541) 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 3 ways as a sum of consecutive naturals, for example, 23273721 + ... + 23273726.

It is an arithmetic number, because the mean of its divisors is an integer number (46547448).

Almost surely, 2^139642341 is an apocalyptic number.

It is an amenable number.

139642341 is a deficient number, since it is larger than the sum of its proper divisors (46547451).

139642341 is an equidigital number, since it uses as much as digits as its factorization.

139642341 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46547450.

The product of its digits is 15552, while the sum is 33.

The square root of 139642341 is about 11817.0360497038. The cubic root of 139642341 is about 518.8068563801.

The spelling of 139642341 in words is "one hundred thirty-nine million, six hundred forty-two thousand, three hundred forty-one".