3962661 has 4 divisors (see below), whose sum is σ = 5283552. Its totient is φ = 2641772.

The previous prime is 3962653. The next prime is 3962671. The reversal of 3962661 is 1662693.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 3962661 - 2³ = 3962653 is a prime.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3962611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 660441 + ... + 660446.

It is an arithmetic number, because the mean of its divisors is an integer number (1320888).

Almost surely, 2^3962661 is an apocalyptic number.

It is an amenable number.

3962661 is a deficient number, since it is larger than the sum of its proper divisors (1320891).

3962661 is a wasteful number, since it uses less digits than its factorization.

3962661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1320890.

The product of its digits is 11664, while the sum is 33.

The square root of 3962661 is about 1990.6433633376. The cubic root of 3962661 is about 158.2446271969.

Subtracting from 3962661 its reverse (1662693), we obtain a cube (2299968 = 132³).

The spelling of 3962661 in words is "three million, nine hundred sixty-two thousand, six hundred sixty-one".