7742427 has 32 divisors (see below), whose sum is σ = 13023744. Its totient is φ = 4007520.

The previous prime is 7742419. The next prime is 7742437. The reversal of 7742427 is 7242477.

It is not a de Polignac number, because 7742427 - 2³ = 7742419 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (7742417) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 27813 + ... + 28089.

It is an arithmetic number, because the mean of its divisors is an integer number (406992).

Almost surely, 2^7742427 is an apocalyptic number.

7742427 is a gapful number since it is divisible by the number (77) formed by its first and last digit.

7742427 is a deficient number, since it is larger than the sum of its proper divisors (5281317).

7742427 is a wasteful number, since it uses less digits than its factorization.

7742427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320 (or 298 counting only the distinct ones).

The product of its digits is 21952, while the sum is 33.

The square root of 7742427 is about 2782.5216980286. The cubic root of 7742427 is about 197.8301011694.

The spelling of 7742427 in words is "seven million, seven hundred forty-two thousand, four hundred twenty-seven".