7428427 has 4 divisors (see below), whose sum is σ = 7568640. Its totient is φ = 7288216.

The previous prime is 7428419. The next prime is 7428431. The reversal of 7428427 is 7248247.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7248247 = 179 ⋅40493.

It is a cyclic number.

It is not a de Polignac number, because 7428427 - 2³ = 7428419 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7428392 and 7428401.

It is not an unprimeable number, because it can be changed into a prime (7428457) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70027 + ... + 70132.

It is an arithmetic number, because the mean of its divisors is an integer number (1892160).

Almost surely, 2^7428427 is an apocalyptic number.

7428427 is a deficient number, since it is larger than the sum of its proper divisors (140213).

7428427 is a wasteful number, since it uses less digits than its factorization.

7428427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140212.

The product of its digits is 25088, while the sum is 34.

The square root of 7428427 is about 2725.5140799490. The cubic root of 7428427 is about 195.1187267337.

The spelling of 7428427 in words is "seven million, four hundred twenty-eight thousand, four hundred twenty-seven".