7942426 has 4 divisors (see below), whose sum is σ = 11913642. Its totient is φ = 3971212.

The previous prime is 7942411. The next prime is 7942427. The reversal of 7942426 is 6242497.

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

It can be written as a sum of positive squares in only one way, i.e., 6765201 + 1177225 = 2601^2 + 1085^2 .

It is a d-powerful number, because it can be written as 7⁸ + 9 + 4² + 2¹⁵ + 4⁵ + 2²¹ + 6⁶ .

It is a junction number, because it is equal to n+sod(n) for n = 7942391 and 7942400.

It is not an unprimeable number, because it can be changed into a prime (7942427) by changing a digit.

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 as a sum of consecutive naturals, namely, 1985605 + ... + 1985608.

Almost surely, 2^7942426 is an apocalyptic number.

7942426 is a deficient number, since it is larger than the sum of its proper divisors (3971216).

7942426 is a wasteful number, since it uses less digits than its factorization.

7942426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3971215.

The product of its digits is 24192, while the sum is 34.

The square root of 7942426 is about 2818.2310054359. The cubic root of 7942426 is about 199.5190610825.

The spelling of 7942426 in words is "seven million, nine hundred forty-two thousand, four hundred twenty-six".