1226419987 has 18 divisors (see below), whose sum is σ = 1342526796. Its totient is φ = 1119802320.

The previous prime is 1226419973. The next prime is 1226420011. The reversal of 1226419987 is 7899146221.

It is not a de Polignac number, because 1226419987 - 2²⁷ = 1092202259 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1226419987.

It is not an unprimeable number, because it can be changed into a prime (1226419907) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 5812312 + ... + 5812522.

It is an arithmetic number, because the mean of its divisors is an integer number (74584822).

Almost surely, 2^1226419987 is an apocalyptic number.

1226419987 is a deficient number, since it is larger than the sum of its proper divisors (116106809).

1226419987 is an equidigital number, since it uses as much as digits as its factorization.

1226419987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 611 (or 387 counting only the distinct ones).

The product of its digits is 435456, while the sum is 49.

The square root of 1226419987 is about 35020.2796533666. The cubic root of 1226419987 is about 1070.4007544753.

The spelling of 1226419987 in words is "one billion, two hundred twenty-six million, four hundred nineteen thousand, nine hundred eighty-seven".