1224020651 has 4 divisors (see below), whose sum is σ = 1398880752. Its totient is φ = 1049160552.

The previous prime is 1224020597. The next prime is 1224020659. The reversal of 1224020651 is 1560204221.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1224020651 - 2¹⁸ = 1223758507 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1224020659) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 87430040 + ... + 87430053.

It is an arithmetic number, because the mean of its divisors is an integer number (349720188).

Almost surely, 2^1224020651 is an apocalyptic number.

1224020651 is a deficient number, since it is larger than the sum of its proper divisors (174860101).

1224020651 is an equidigital number, since it uses as much as digits as its factorization.

1224020651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174860100.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 1224020651 is about 34986.0065026004. The cubic root of 1224020651 is about 1069.7022640902.

Adding to 1224020651 its reverse (1560204221), we get a palindrome (2784224872).

The spelling of 1224020651 in words is "one billion, two hundred twenty-four million, twenty thousand, six hundred fifty-one".