1226534409 has 24 divisors (see below), whose sum is σ = 1870989120. Its totient is φ = 772703712.

The previous prime is 1226534401. The next prime is 1226534483. The reversal of 1226534409 is 9044356221.

It is a happy number.

It is not a de Polignac number, because 1226534409 - 2³ = 1226534401 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1226534401) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18514 + ... + 52875.

It is an arithmetic number, because the mean of its divisors is an integer number (77957880).

Almost surely, 2^1226534409 is an apocalyptic number.

It is an amenable number.

1226534409 is a deficient number, since it is larger than the sum of its proper divisors (644454711).

1226534409 is a wasteful number, since it uses less digits than its factorization.

1226534409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71501 (or 71498 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 1226534409 is about 35021.9132686951. The cubic root of 1226534409 is about 1070.4340420352.

The spelling of 1226534409 in words is "one billion, two hundred twenty-six million, five hundred thirty-four thousand, four hundred nine".