3906551 has 8 divisors (see below), whose sum is σ = 4295808. Its totient is φ = 3523000.

The previous prime is 3906547. The next prime is 3906557. The reversal of 3906551 is 1556093.

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

It is a cyclic number.

It is not a de Polignac number, because 3906551 - 2² = 3906547 is a prime.

It is a super-2 number, since 2×3906551² = 30522281431202, which contains 22 as substring.

It is a d-powerful number, because it can be written as 3 + 9² + 0 + 6³ + 5⁹ + 5⁹ + 1 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3906557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 86 + ... + 2796.

It is an arithmetic number, because the mean of its divisors is an integer number (536976).

Almost surely, 2^3906551 is an apocalyptic number.

3906551 is a deficient number, since it is larger than the sum of its proper divisors (389257).

3906551 is a wasteful number, since it uses less digits than its factorization.

3906551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2853.

The product of its (nonzero) digits is 4050, while the sum is 29.

The square root of 3906551 is about 1976.4996837844. The cubic root of 3906551 is about 157.4941763195.

The spelling of 3906551 in words is "three million, nine hundred six thousand, five hundred fifty-one".