7139426 has 8 divisors (see below), whose sum is σ = 12239040. Its totient is φ = 3059748.

The previous prime is 7139401. The next prime is 7139437. The reversal of 7139426 is 6249317.

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

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 7139392 and 7139401.

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 3 ways as a sum of consecutive naturals, for example, 254966 + ... + 254993.

It is an arithmetic number, because the mean of its divisors is an integer number (1529880).

Almost surely, 2^7139426 is an apocalyptic number.

7139426 is a deficient number, since it is larger than the sum of its proper divisors (5099614).

7139426 is a wasteful number, since it uses less digits than its factorization.

7139426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 509968.

The product of its digits is 9072, while the sum is 32.

The square root of 7139426 is about 2671.9704339682. The cubic root of 7139426 is about 192.5548367977.

The spelling of 7139426 in words is "seven million, one hundred thirty-nine thousand, four hundred twenty-six".