1421891351 has 4 divisors (see below), whose sum is σ = 1423193352. Its totient is φ = 1420589352.

The previous prime is 1421891347. The next prime is 1421891371. The reversal of 1421891351 is 1531981241.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1421891351 - 2² = 1421891347 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1421891321) 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, 649361 + ... + 651546.

It is an arithmetic number, because the mean of its divisors is an integer number (355798338).

Almost surely, 2^1421891351 is an apocalyptic number.

1421891351 is a deficient number, since it is larger than the sum of its proper divisors (1302001).

1421891351 is a wasteful number, since it uses less digits than its factorization.

1421891351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1302000.

The product of its digits is 8640, while the sum is 35.

The square root of 1421891351 is about 37707.9746340214. The cubic root of 1421891351 is about 1124.4896716813.

The spelling of 1421891351 in words is "one billion, four hundred twenty-one million, eight hundred ninety-one thousand, three hundred fifty-one".