1401200421 has 4 divisors (see below), whose sum is σ = 1868267232. Its totient is φ = 934133612.

The previous prime is 1401200419. The next prime is 1401200443. The reversal of 1401200421 is 1240021041.

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 1401200421 - 2¹ = 1401200419 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1401200421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1401200491) 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, 233533401 + ... + 233533406.

It is an arithmetic number, because the mean of its divisors is an integer number (467066808).

Almost surely, 2^1401200421 is an apocalyptic number.

It is an amenable number.

1401200421 is a deficient number, since it is larger than the sum of its proper divisors (467066811).

1401200421 is an equidigital number, since it uses as much as digits as its factorization.

1401200421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 467066810.

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 1401200421 is about 37432.6117309493. The cubic root of 1401200421 is about 1119.0085882865.

Adding to 1401200421 its reverse (1240021041), we get a palindrome (2641221462).

The spelling of 1401200421 in words is "one billion, four hundred one million, two hundred thousand, four hundred twenty-one".