3996761 has 4 divisors (see below), whose sum is σ = 4000932. Its totient is φ = 3992592.

The previous prime is 3996743. The next prime is 3996763. The reversal of 3996761 is 1676993.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 1547536 + 2449225 = 1244^2 + 1565^2 .

It is a cyclic number.

It is not a de Polignac number, because 3996761 - 2¹⁴ = 3980377 is a prime.

It is a super-2 number, since 2×3996761² = 31948196982242, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3996763) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 155 + ... + 2831.

It is an arithmetic number, because the mean of its divisors is an integer number (1000233).

Almost surely, 2^3996761 is an apocalyptic number.

It is an amenable number.

3996761 is a deficient number, since it is larger than the sum of its proper divisors (4171).

3996761 is a wasteful number, since it uses less digits than its factorization.

3996761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4170.

The product of its digits is 61236, while the sum is 41.

The square root of 3996761 is about 1999.1900860098. The cubic root of 3996761 is about 158.6972470265.

The spelling of 3996761 in words is "three million, nine hundred ninety-six thousand, seven hundred sixty-one".