7940505 has 16 divisors (see below), whose sum is σ = 12896064. Its totient is φ = 4171200.

The previous prime is 7940503. The next prime is 7940507. The reversal of 7940505 is 5050497.

It is an interprime number because it is at equal distance from previous prime (7940503) and next prime (7940507).

It is not a de Polignac number, because 7940505 - 2¹ = 7940503 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (7940503) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2946 + ... + 4955.

It is an arithmetic number, because the mean of its divisors is an integer number (806004).

Almost surely, 2^7940505 is an apocalyptic number.

It is an amenable number.

7940505 is a deficient number, since it is larger than the sum of its proper divisors (4955559).

7940505 is a wasteful number, since it uses less digits than its factorization.

7940505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7976.

The product of its (nonzero) digits is 6300, while the sum is 30.

The square root of 7940505 is about 2817.8901681932. The cubic root of 7940505 is about 199.5029741832.

The spelling of 7940505 in words is "seven million, nine hundred forty thousand, five hundred five".