7240905 has 48 divisors (see below), whose sum is σ = 14536704. Its totient is φ = 3265920.

The previous prime is 7240901. The next prime is 7240907. The reversal of 7240905 is 5090427.

It is not a de Polignac number, because 7240905 - 2² = 7240901 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7240901) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 39915 + ... + 40095.

It is an arithmetic number, because the mean of its divisors is an integer number (302848).

Almost surely, 2^7240905 is an apocalyptic number.

It is an amenable number.

7240905 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

7240905 is a wasteful number, since it uses less digits than its factorization.

7240905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 326 (or 323 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 7240905 is about 2690.8929744603. The cubic root of 7240905 is about 193.4628656982.

The spelling of 7240905 in words is "seven million, two hundred forty thousand, nine hundred five".