7742945 has 8 divisors (see below), whose sum is σ = 10618944. Its totient is φ = 5309424.

The previous prime is 7742941. The next prime is 7742947. The reversal of 7742945 is 5492477.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 7742945 - 2² = 7742941 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 7742899 and 7742908.

It is not an unprimeable number, because it can be changed into a prime (7742941) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 110579 + ... + 110648.

It is an arithmetic number, because the mean of its divisors is an integer number (1327368).

Almost surely, 2^7742945 is an apocalyptic number.

It is an amenable number.

7742945 is a deficient number, since it is larger than the sum of its proper divisors (2875999).

7742945 is a wasteful number, since it uses less digits than its factorization.

7742945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221239.

The product of its digits is 70560, while the sum is 38.

The square root of 7742945 is about 2782.6147775069. The cubic root of 7742945 is about 197.8345129517.

The spelling of 7742945 in words is "seven million, seven hundred forty-two thousand, nine hundred forty-five".