1224155764 has 48 divisors (see below), whose sum is σ = 2336241600. Its totient is φ = 557899776.

The previous prime is 1224155719. The next prime is 1224155773. The reversal of 1224155764 is 4675514221.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1857267 + ... + 1857925.

It is an arithmetic number, because the mean of its divisors is an integer number (48671700).

Almost surely, 2^1224155764 is an apocalyptic number.

It is an amenable number.

1224155764 is a deficient number, since it is larger than the sum of its proper divisors (1112085836).

1224155764 is a wasteful number, since it uses less digits than its factorization.

1224155764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1072 (or 1070 counting only the distinct ones).

The product of its digits is 67200, while the sum is 37.

The square root of 1224155764 is about 34987.9374070550. The cubic root of 1224155764 is about 1069.7416221855.

Adding to 1224155764 its reverse (4675514221), we get a palindrome (5899669985).

The spelling of 1224155764 in words is "one billion, two hundred twenty-four million, one hundred fifty-five thousand, seven hundred sixty-four".