4049951 has 4 divisors (see below), whose sum is σ = 4056504. Its totient is φ = 4043400.

The previous prime is 4049923. The next prime is 4049953. The reversal of 4049951 is 1599404.

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 4049951 - 2⁶ = 4049887 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 (4049953) 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, 2240 + ... + 3621.

It is an arithmetic number, because the mean of its divisors is an integer number (1014126).

Almost surely, 2^4049951 is an apocalyptic number.

4049951 is a deficient number, since it is larger than the sum of its proper divisors (6553).

4049951 is an equidigital number, since it uses as much as digits as its factorization.

4049951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6552.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 4049951 is about 2012.4490055651. The cubic root of 4049951 is about 159.3981425320.

It can be divided in two parts, 404 and 9951, that multiplied together give a palindrome (4020204).

The spelling of 4049951 in words is "four million, forty-nine thousand, nine hundred fifty-one".