3906651 has 32 divisors (see below), whose sum is σ = 6524928. Its totient is φ = 2027520.

The previous prime is 3906641. The next prime is 3906653. The reversal of 3906651 is 1566093.

It is a happy number.

It is not a de Polignac number, because 3906651 - 2¹¹ = 3904603 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3906653) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10891 + ... + 11243.

It is an arithmetic number, because the mean of its divisors is an integer number (203904).

Almost surely, 2^3906651 is an apocalyptic number.

3906651 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

3906651 is a deficient number, since it is larger than the sum of its proper divisors (2618277).

3906651 is a wasteful number, since it uses less digits than its factorization.

3906651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 411.

The product of its (nonzero) digits is 4860, while the sum is 30.

The square root of 3906651 is about 1976.5249808692. The cubic root of 3906651 is about 157.4955201548.

The spelling of 3906651 in words is "three million, nine hundred six thousand, six hundred fifty-one".