3975551 has 4 divisors (see below), whose sum is σ = 3990600. Its totient is φ = 3960504.

The previous prime is 3975547. The next prime is 3975577. The reversal of 3975551 is 1555793.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 3975551 - 2² = 3975547 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3975511) 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, 7121 + ... + 7658.

It is an arithmetic number, because the mean of its divisors is an integer number (997650).

Almost surely, 2^3975551 is an apocalyptic number.

3975551 is a deficient number, since it is larger than the sum of its proper divisors (15049).

3975551 is a wasteful number, since it uses less digits than its factorization.

3975551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15048.

The product of its digits is 23625, while the sum is 35.

The square root of 3975551 is about 1993.8783814466. The cubic root of 3975551 is about 158.4160242733.

The spelling of 3975551 in words is "three million, nine hundred seventy-five thousand, five hundred fifty-one".