7042909 has 4 divisors (see below), whose sum is σ = 7060060. Its totient is φ = 7025760.

The previous prime is 7042907. The next prime is 7042933. The reversal of 7042909 is 9092407.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9092407 = 139 ⋅65413.

It can be written as a sum of positive squares in 2 ways, for example, as 1651225 + 5391684 = 1285^2 + 2322^2 .

It is a cyclic number.

It is not a de Polignac number, because 7042909 - 2¹ = 7042907 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7042907) 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, 7944 + ... + 8785.

It is an arithmetic number, because the mean of its divisors is an integer number (1765015).

Almost surely, 2^7042909 is an apocalyptic number.

It is an amenable number.

7042909 is a deficient number, since it is larger than the sum of its proper divisors (17151).

7042909 is a wasteful number, since it uses less digits than its factorization.

7042909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17150.

The product of its (nonzero) digits is 4536, while the sum is 31.

The square root of 7042909 is about 2653.8479609804. The cubic root of 7042909 is about 191.6831888299.

The spelling of 7042909 in words is "seven million, forty-two thousand, nine hundred nine".