3994457 has 4 divisors (see below), whose sum is σ = 4005540. Its totient is φ = 3983376.

The previous prime is 3994453. The next prime is 3994481. The reversal of 3994457 is 7544993.

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

It can be written as a sum of positive squares in 2 ways, for example, as 3182656 + 811801 = 1784^2 + 901^2 .

It is a cyclic number.

It is not a de Polignac number, because 3994457 - 2² = 3994453 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3994453) 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, 4982 + ... + 5727.

It is an arithmetic number, because the mean of its divisors is an integer number (1001385).

Almost surely, 2^3994457 is an apocalyptic number.

It is an amenable number.

3994457 is a deficient number, since it is larger than the sum of its proper divisors (11083).

3994457 is a wasteful number, since it uses less digits than its factorization.

3994457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11082.

The product of its digits is 136080, while the sum is 41.

The square root of 3994457 is about 1998.6137695913. The cubic root of 3994457 is about 158.6667466006. Note that the first 3 decimals are identical.

The spelling of 3994457 in words is "three million, nine hundred ninety-four thousand, four hundred fifty-seven".