4001221374 has 16 divisors (see below), whose sum is σ = 8121883008. Its totient is φ = 1313833752.

The previous prime is 4001221369. The next prime is 4001221387. The reversal of 4001221374 is 4731221004.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4976242 + ... + 4977045.

It is an arithmetic number, because the mean of its divisors is an integer number (507617688).

Almost surely, 2^4001221374 is an apocalyptic number.

4001221374 is an abundant number, since it is smaller than the sum of its proper divisors (4120661634).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

4001221374 is a wasteful number, since it uses less digits than its factorization.

4001221374 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9953359.

The product of its (nonzero) digits is 1344, while the sum is 24.

The square root of 4001221374 is about 63255.2082756827. The cubic root of 4001221374 is about 1587.5626030575.

Adding to 4001221374 its reverse (4731221004), we get a palindrome (8732442378).

The spelling of 4001221374 in words is "four billion, one million, two hundred twenty-one thousand, three hundred seventy-four".