1421365401 has 45 divisors (see below), whose sum is σ = 2190721093. Its totient is φ = 918396360.

The previous prime is 1421365373. The next prime is 1421365447. The reversal of 1421365401 is 1045631241.

It is a happy number.

The square root of 1421365401 is 37701.

It is a perfect power (a square), and thus also a powerful number.

1421365401 is a `hidden beast` number, since 1 + 4 + 2 + 1 + 3 + 654 + 0 + 1 = 666.

It is not a de Polignac number, because 1421365401 - 2⁵ = 1421365369 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1421365481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 20019196 + ... + 20019266.

Almost surely, 2^1421365401 is an apocalyptic number.

1421365401 is the 37701-st square number.

1421365401 is the 18851-st centered octagonal number.

It is an amenable number.

1421365401 is a deficient number, since it is larger than the sum of its proper divisors (769355692).

1421365401 is an frugal number, since it uses more digits than its factorization.

1421365401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272 (or 133 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The cubic root of 1421365401 is about 1124.3510070125.

Adding to 1421365401 its reverse (1045631241), we get a palindrome (2466996642).

The spelling of 1421365401 in words is "one billion, four hundred twenty-one million, three hundred sixty-five thousand, four hundred one".