4001140421 has 4 divisors (see below), whose sum is σ = 4175103072. Its totient is φ = 3827177772.

The previous prime is 4001140399. The next prime is 4001140427. The reversal of 4001140421 is 1240411004.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 4001140421 - 2²² = 3996946117 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 4001140421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4001140427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86981291 + ... + 86981336.

It is an arithmetic number, because the mean of its divisors is an integer number (1043775768).

Almost surely, 2^4001140421 is an apocalyptic number.

It is an amenable number.

4001140421 is a deficient number, since it is larger than the sum of its proper divisors (173962651).

4001140421 is a wasteful number, since it uses less digits than its factorization.

4001140421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173962650.

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 4001140421 is about 63254.5683804735. The cubic root of 4001140421 is about 1587.5518964248.

Adding to 4001140421 its reverse (1240411004), we get a palindrome (5241551425).

The spelling of 4001140421 in words is "four billion, one million, one hundred forty thousand, four hundred twenty-one".