7742245 has 12 divisors (see below), whose sum is σ = 10807884. Its totient is φ = 5308800.

The previous prime is 7742239. The next prime is 7742299. The reversal of 7742245 is 5422477.

It can be written as a sum of positive squares in 2 ways, for example, as 5239521 + 2502724 = 2289^2 + 1582^2 .

It is not a de Polignac number, because 7742245 - 2²¹ = 5645093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15556 + ... + 16045.

It is an arithmetic number, because the mean of its divisors is an integer number (900657).

Almost surely, 2^7742245 is an apocalyptic number.

It is an amenable number.

7742245 is a deficient number, since it is larger than the sum of its proper divisors (3065639).

7742245 is a wasteful number, since it uses less digits than its factorization.

7742245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31620 (or 31613 counting only the distinct ones).

The product of its digits is 15680, while the sum is 31.

The square root of 7742245 is about 2782.4889936889. The cubic root of 7742245 is about 197.8285510370.

The spelling of 7742245 in words is "seven million, seven hundred forty-two thousand, two hundred forty-five".