1420021401 has 4 divisors (see below), whose sum is σ = 1893361872. Its totient is φ = 946680932.

The previous prime is 1420021391. The next prime is 1420021469. The reversal of 1420021401 is 1041200241.

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 1420021401 - 2¹¹ = 1420019353 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1420023401) 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, 236670231 + ... + 236670236.

It is an arithmetic number, because the mean of its divisors is an integer number (473340468).

Almost surely, 2^1420021401 is an apocalyptic number.

It is an amenable number.

1420021401 is a deficient number, since it is larger than the sum of its proper divisors (473340471).

1420021401 is an equidigital number, since it uses as much as digits as its factorization.

1420021401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 473340470.

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

The square root of 1420021401 is about 37683.1713235497. The cubic root of 1420021401 is about 1123.9965111888.

Adding to 1420021401 its reverse (1041200241), we get a palindrome (2461221642).

The spelling of 1420021401 in words is "one billion, four hundred twenty million, twenty-one thousand, four hundred one".