1421440401 has 4 divisors (see below), whose sum is σ = 1895253872. Its totient is φ = 947626932.

The previous prime is 1421440381. The next prime is 1421440409. The reversal of 1421440401 is 1040441241.

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 not a de Polignac number, because 1421440401 - 2⁹ = 1421439889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1421440409) 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, 236906731 + ... + 236906736.

It is an arithmetic number, because the mean of its divisors is an integer number (473813468).

Almost surely, 2^1421440401 is an apocalyptic number.

It is an amenable number.

1421440401 is a deficient number, since it is larger than the sum of its proper divisors (473813471).

1421440401 is an equidigital number, since it uses as much as digits as its factorization.

1421440401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 473813470.

The product of its (nonzero) digits is 512, while the sum is 21.

The square root of 1421440401 is about 37701.9946554556. The cubic root of 1421440401 is about 1124.3707825613.

Adding to 1421440401 its reverse (1040441241), we get a palindrome (2461881642).

It can be divided in two parts, 14214 and 40401, that added together give a triangular number (54615 = T₃₃₀).

The spelling of 1421440401 in words is "one billion, four hundred twenty-one million, four hundred forty thousand, four hundred one".