1421440201 has 4 divisors (see below), whose sum is σ = 1421604112. Its totient is φ = 1421276292.

The previous prime is 1421440187. The next prime is 1421440219. The reversal of 1421440201 is 1020441241.

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 1421440201 - 2⁷ = 1421440073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1421440291) 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, 68175 + ... + 86548.

It is an arithmetic number, because the mean of its divisors is an integer number (355401028).

Almost surely, 2^1421440201 is an apocalyptic number.

It is an amenable number.

1421440201 is a deficient number, since it is larger than the sum of its proper divisors (163911).

1421440201 is an equidigital number, since it uses as much as digits as its factorization.

1421440201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163910.

The product of its (nonzero) digits is 256, while the sum is 19.

The square root of 1421440201 is about 37701.9920030759. The cubic root of 1421440201 is about 1124.3707298274.

Adding to 1421440201 its reverse (1020441241), we get a palindrome (2441881442).

The spelling of 1421440201 in words is "one billion, four hundred twenty-one million, four hundred forty thousand, two hundred one".