8401139 has 4 divisors (see below), whose sum is σ = 8432640. Its totient is φ = 8369640.

The previous prime is 8401121. The next prime is 8401147. The reversal of 8401139 is 9311048.

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

It is a cyclic number.

It is not a de Polignac number, because 8401139 - 2⁸ = 8400883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8401199) 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, 15347 + ... + 15884.

It is an arithmetic number, because the mean of its divisors is an integer number (2108160).

Almost surely, 2^8401139 is an apocalyptic number.

8401139 is a deficient number, since it is larger than the sum of its proper divisors (31501).

8401139 is a wasteful number, since it uses less digits than its factorization.

8401139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31500.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 8401139 is about 2898.4718387454. The cubic root of 8401139 is about 203.2884588481.

Subtracting 8401139 from its reverse (9311048), we obtain a palindrome (909909).

The spelling of 8401139 in words is "eight million, four hundred one thousand, one hundred thirty-nine".