7072409 has 4 divisors (see below), whose sum is σ = 7090980. Its totient is φ = 7053840.

The previous prime is 7072399. The next prime is 7072411. The reversal of 7072409 is 9042707.

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 4528384 + 2544025 = 2128^2 + 1595^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7072409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7072909) 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, 8702 + ... + 9479.

It is an arithmetic number, because the mean of its divisors is an integer number (1772745).

Almost surely, 2^7072409 is an apocalyptic number.

It is an amenable number.

7072409 is a deficient number, since it is larger than the sum of its proper divisors (18571).

7072409 is a wasteful number, since it uses less digits than its factorization.

7072409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18570.

The product of its (nonzero) digits is 3528, while the sum is 29.

The square root of 7072409 is about 2659.4001203279. The cubic root of 7072409 is about 191.9504447485.

The spelling of 7072409 in words is "seven million, seventy-two thousand, four hundred nine".