7404139 has 4 divisors (see below), whose sum is σ = 7426840. Its totient is φ = 7381440.

The previous prime is 7404101. The next prime is 7404161. The reversal of 7404139 is 9314047.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7404139 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (7401139) 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, 10854 + ... + 11515.

It is an arithmetic number, because the mean of its divisors is an integer number (1856710).

Almost surely, 2^7404139 is an apocalyptic number.

7404139 is a deficient number, since it is larger than the sum of its proper divisors (22701).

7404139 is a wasteful number, since it uses less digits than its factorization.

7404139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22700.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 7404139 is about 2721.0547587287. The cubic root of 7404139 is about 194.9058410193.

The spelling of 7404139 in words is "seven million, four hundred four thousand, one hundred thirty-nine".