7245139 has 4 divisors (see below), whose sum is σ = 7903800. Its totient is φ = 6586480.

The previous prime is 7245127. The next prime is 7245143. The reversal of 7245139 is 9315427.

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 7245139 - 2¹³ = 7236947 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 7245139.

It is not an unprimeable number, because it can be changed into a prime (7245239) 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, 329314 + ... + 329335.

It is an arithmetic number, because the mean of its divisors is an integer number (1975950).

Almost surely, 2^7245139 is an apocalyptic number.

7245139 is a deficient number, since it is larger than the sum of its proper divisors (658661).

7245139 is a wasteful number, since it uses less digits than its factorization.

7245139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 658660.

The product of its digits is 7560, while the sum is 31.

The square root of 7245139 is about 2691.6795871723. The cubic root of 7245139 is about 193.5005664262.

The spelling of 7245139 in words is "seven million, two hundred forty-five thousand, one hundred thirty-nine".