1226279572 has 24 divisors (see below), whose sum is σ = 2460565184. Its totient is φ = 523832832.

The previous prime is 1226279563. The next prime is 1226279573. The reversal of 1226279572 is 2759726221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1226279573) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62733 + ... + 79924.

Almost surely, 2^1226279572 is an apocalyptic number.

It is an amenable number.

1226279572 is an abundant number, since it is smaller than the sum of its proper divisors (1234285612).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1226279572 is a wasteful number, since it uses less digits than its factorization.

1226279572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142975 (or 142973 counting only the distinct ones).

The product of its digits is 211680, while the sum is 43.

The square root of 1226279572 is about 35018.2748290089. The cubic root of 1226279572 is about 1070.3599022224.

The spelling of 1226279572 in words is "one billion, two hundred twenty-six million, two hundred seventy-nine thousand, five hundred seventy-two".