6749642 has 4 divisors (see below), whose sum is σ = 10124466. Its totient is φ = 3374820.

The previous prime is 6749627. The next prime is 6749657. The reversal of 6749642 is 2469476.

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

It is an interprime number because it is at equal distance from previous prime (6749627) and next prime (6749657).

It can be written as a sum of positive squares in only one way, i.e., 3964081 + 2785561 = 1991^2 + 1669^2 .

It is a d-powerful number, because it can be written as 6⁴ + 7⁶ + 4⁴ + 9⁵ + 6⁷ + 4¹¹ + 2²¹ .

It is a junction number, because it is equal to n+sod(n) for n = 6749596 and 6749605.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1687409 + ... + 1687412.

Almost surely, 2^6749642 is an apocalyptic number.

6749642 is a deficient number, since it is larger than the sum of its proper divisors (3374824).

6749642 is a wasteful number, since it uses less digits than its factorization.

6749642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3374823.

The product of its digits is 72576, while the sum is 38.

The square root of 6749642 is about 2598.0073133076. The cubic root of 6749642 is about 188.9848163012.

Subtracting from 6749642 its sum of digits (38), we obtain a square (6749604 = 2598²).

The spelling of 6749642 in words is "six million, seven hundred forty-nine thousand, six hundred forty-two".