1226423287 has 4 divisors (see below), whose sum is σ = 1243223680. Its totient is φ = 1209622896.

The previous prime is 1226423249. The next prime is 1226423327. The reversal of 1226423287 is 7823246221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7823246221 = 7 ⋅1117606603.

It is a cyclic number.

It is not a de Polignac number, because 1226423287 - 2²⁷ = 1092205559 is a prime.

It is a super-2 number, since 2×1226423287² = 3008228157791768738, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1226423087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8400087 + ... + 8400232.

It is an arithmetic number, because the mean of its divisors is an integer number (310805920).

Almost surely, 2^1226423287 is an apocalyptic number.

1226423287 is a deficient number, since it is larger than the sum of its proper divisors (16800393).

1226423287 is an equidigital number, since it uses as much as digits as its factorization.

1226423287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16800392.

The product of its digits is 64512, while the sum is 37.

The square root of 1226423287 is about 35020.3267688924. The cubic root of 1226423287 is about 1070.4017145377.

The spelling of 1226423287 in words is "one billion, two hundred twenty-six million, four hundred twenty-three thousand, two hundred eighty-seven".