1264221242 has 16 divisors (see below), whose sum is σ = 1959658272. Its totient is φ = 611293200.

The previous prime is 1264221241. The next prime is 1264221307. The reversal of 1264221242 is 2421224621.

It is not an unprimeable number, because it can be changed into a prime (1264221241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64088 + ... + 81459.

It is an arithmetic number, because the mean of its divisors is an integer number (122478642).

Almost surely, 2^1264221242 is an apocalyptic number.

1264221242 is a deficient number, since it is larger than the sum of its proper divisors (695437030).

1264221242 is a wasteful number, since it uses less digits than its factorization.

1264221242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145693.

The product of its digits is 3072, while the sum is 26.

The square root of 1264221242 is about 35555.8889918393. Note that the first 3 decimals coincide. The cubic root of 1264221242 is about 1081.2871148475.

Adding to 1264221242 its reverse (2421224621), we get a palindrome (3685445863).

The spelling of 1264221242 in words is "one billion, two hundred sixty-four million, two hundred twenty-one thousand, two hundred forty-two".