1426161891 has 16 divisors (see below), whose sum is σ = 2370763008. Its totient is φ = 740863200.

The previous prime is 1426161881. The next prime is 1426161949. The reversal of 1426161891 is 1981616241.

It is not a de Polignac number, because 1426161891 - 2⁹ = 1426161379 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1426161881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3086700 + ... + 3087161.

It is an arithmetic number, because the mean of its divisors is an integer number (148172688).

Almost surely, 2^1426161891 is an apocalyptic number.

1426161891 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1426161891 is a deficient number, since it is larger than the sum of its proper divisors (944601117).

1426161891 is a wasteful number, since it uses less digits than its factorization.

1426161891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6173882.

The product of its digits is 20736, while the sum is 39.

The square root of 1426161891 is about 37764.5586628521. The cubic root of 1426161891 is about 1125.6143189029.

The spelling of 1426161891 in words is "one billion, four hundred twenty-six million, one hundred sixty-one thousand, eight hundred ninety-one".