1421431451 has 4 divisors (see below), whose sum is σ = 1550652504. Its totient is φ = 1292210400.

The previous prime is 1421431411. The next prime is 1421431457. The reversal of 1421431451 is 1541341241.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1421431451 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1421431451.

It is not an unprimeable number, because it can be changed into a prime (1421431457) 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, 64610510 + ... + 64610531.

It is an arithmetic number, because the mean of its divisors is an integer number (387663126).

Almost surely, 2^1421431451 is an apocalyptic number.

1421431451 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1421431451 is a deficient number, since it is larger than the sum of its proper divisors (129221053).

1421431451 is a wasteful number, since it uses less digits than its factorization.

1421431451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129221052.

The product of its digits is 1920, while the sum is 26.

The square root of 1421431451 is about 37701.8759612834. The cubic root of 1421431451 is about 1124.3684227157.

Adding to 1421431451 its reverse (1541341241), we get a palindrome (2962772692).

The spelling of 1421431451 in words is "one billion, four hundred twenty-one million, four hundred thirty-one thousand, four hundred fifty-one".