3706642 has 4 divisors (see below), whose sum is σ = 5559966. Its totient is φ = 1853320.

The previous prime is 3706631. The next prime is 3706649. The reversal of 3706642 is 2466073.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2466073 = 29 ⋅85037.

It can be written as a sum of positive squares in only one way, i.e., 2019241 + 1687401 = 1421^2 + 1299^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 3706642.

It is not an unprimeable number, because it can be changed into a prime (3706649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 926659 + ... + 926662.

Almost surely, 2^3706642 is an apocalyptic number.

3706642 is a deficient number, since it is larger than the sum of its proper divisors (1853324).

3706642 is a wasteful number, since it uses less digits than its factorization.

3706642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1853323.

The product of its (nonzero) digits is 6048, while the sum is 28.

The square root of 3706642 is about 1925.2641377224. The cubic root of 3706642 is about 154.7605320618.

The spelling of 3706642 in words is "three million, seven hundred six thousand, six hundred forty-two".