3999455 has 4 divisors (see below), whose sum is σ = 4799352. Its totient is φ = 3199560.

The previous prime is 3999449. The next prime is 3999461. The reversal of 3999455 is 5549993.

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

It is an interprime number because it is at equal distance from previous prime (3999449) and next prime (3999461).

It is not a de Polignac number, because 3999455 - 2⁴ = 3999439 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 399941 + ... + 399950.

It is an arithmetic number, because the mean of its divisors is an integer number (1199838).

Almost surely, 2^3999455 is an apocalyptic number.

3999455 is a deficient number, since it is larger than the sum of its proper divisors (799897).

3999455 is an equidigital number, since it uses as much as digits as its factorization.

3999455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 799896.

The product of its digits is 218700, while the sum is 44.

The square root of 3999455 is about 1999.8637453587. The cubic root of 3999455 is about 158.7328954229.

The spelling of 3999455 in words is "three million, nine hundred ninety-nine thousand, four hundred fifty-five".