1420231681 has 4 divisors (see below), whose sum is σ = 1549343664. Its totient is φ = 1291119700.

The previous prime is 1420231679. The next prime is 1420231693. The reversal of 1420231681 is 1861320241.

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 1420231681 - 2¹ = 1420231679 is a prime.

It is a super-2 number, since 2×1420231681² = 4034116055432171522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1420231621) 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, 64555975 + ... + 64555996.

It is an arithmetic number, because the mean of its divisors is an integer number (387335916).

Almost surely, 2^1420231681 is an apocalyptic number.

1420231681 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1420231681 is a deficient number, since it is larger than the sum of its proper divisors (129111983).

1420231681 is a wasteful number, since it uses less digits than its factorization.

1420231681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129111982.

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 1420231681 is about 37685.9613251407. The cubic root of 1420231681 is about 1124.0519897707.

The spelling of 1420231681 in words is "one billion, four hundred twenty million, two hundred thirty-one thousand, six hundred eighty-one".