3651071 has 4 divisors (see below), whose sum is σ = 3777000. Its totient is φ = 3525144.

The previous prime is 3651023. The next prime is 3651083. The reversal of 3651071 is 1701563.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3651071 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3651671) 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, 62921 + ... + 62978.

It is an arithmetic number, because the mean of its divisors is an integer number (944250).

Almost surely, 2^3651071 is an apocalyptic number.

3651071 is a deficient number, since it is larger than the sum of its proper divisors (125929).

3651071 is a wasteful number, since it uses less digits than its factorization.

3651071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125928.

The product of its (nonzero) digits is 630, while the sum is 23.

The square root of 3651071 is about 1910.7775904066. Note that the first 3 decimals coincide. The cubic root of 3651071 is about 153.9832303098.

The spelling of 3651071 in words is "three million, six hundred fifty-one thousand, seventy-one".