1421897151 has 4 divisors (see below), whose sum is σ = 1895862872. Its totient is φ = 947931432.

The previous prime is 1421897143. The next prime is 1421897171. The reversal of 1421897151 is 1517981241.

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

It is not a de Polignac number, because 1421897151 - 2³ = 1421897143 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 (1421897111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 236982856 + ... + 236982861.

It is an arithmetic number, because the mean of its divisors is an integer number (473965718).

Almost surely, 2^1421897151 is an apocalyptic number.

1421897151 is a deficient number, since it is larger than the sum of its proper divisors (473965721).

1421897151 is an equidigital number, since it uses as much as digits as its factorization.

1421897151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 473965720.

The product of its digits is 20160, while the sum is 39.

The square root of 1421897151 is about 37708.0515407519. The cubic root of 1421897151 is about 1124.4912006380.

The spelling of 1421897151 in words is "one billion, four hundred twenty-one million, eight hundred ninety-seven thousand, one hundred fifty-one".