3551971 has 4 divisors (see below), whose sum is σ = 3565072. Its totient is φ = 3538872.

The previous prime is 3551957. The next prime is 3551981. The reversal of 3551971 is 1791553.

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 3551971 - 2⁵ = 3551939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3551921) 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, 6135 + ... + 6688.

It is an arithmetic number, because the mean of its divisors is an integer number (891268).

Almost surely, 2^3551971 is an apocalyptic number.

3551971 is a deficient number, since it is larger than the sum of its proper divisors (13101).

3551971 is a wasteful number, since it uses less digits than its factorization.

3551971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13100.

The product of its digits is 4725, while the sum is 31.

The square root of 3551971 is about 1884.6673446526. The cubic root of 3551971 is about 152.5772572801.

The spelling of 3551971 in words is "three million, five hundred fifty-one thousand, nine hundred seventy-one".