3996745 has 8 divisors (see below), whose sum is σ = 5048640. Its totient is φ = 3029040.

The previous prime is 3996743. The next prime is 3996763. The reversal of 3996745 is 5476993.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3996745 - 2¹ = 3996743 is a prime.

3996745 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (3996743) 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 7 ways as a sum of consecutive naturals, for example, 20941 + ... + 21130.

It is an arithmetic number, because the mean of its divisors is an integer number (631080).

Almost surely, 2^3996745 is an apocalyptic number.

It is an amenable number.

3996745 is a deficient number, since it is larger than the sum of its proper divisors (1051895).

3996745 is a wasteful number, since it uses less digits than its factorization.

3996745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42095.

The product of its digits is 204120, while the sum is 43.

The square root of 3996745 is about 1999.1860843853. The cubic root of 3996745 is about 158.6970352585.

It can be divided in two parts, 3 and 996745, that multiplied together give a triangular number (2990235 = T₂₄₄₅).

The spelling of 3996745 in words is "three million, nine hundred ninety-six thousand, seven hundred forty-five".