7138427 has 4 divisors (see below), whose sum is σ = 7152600. Its totient is φ = 7124256.

The previous prime is 7138409. The next prime is 7138489. The reversal of 7138427 is 7248317.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 7138427 - 2⁶ = 7138363 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7138393 and 7138402.

It is not an unprimeable number, because it can be changed into a prime (7132427) 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, 6302 + ... + 7347.

It is an arithmetic number, because the mean of its divisors is an integer number (1788150).

Almost surely, 2^7138427 is an apocalyptic number.

7138427 is a deficient number, since it is larger than the sum of its proper divisors (14173).

7138427 is a wasteful number, since it uses less digits than its factorization.

7138427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14172.

The product of its digits is 9408, while the sum is 32.

The square root of 7138427 is about 2671.7834867369. The cubic root of 7138427 is about 192.5458551580.

The spelling of 7138427 in words is "seven million, one hundred thirty-eight thousand, four hundred twenty-seven".