1242222747 has 4 divisors (see below), whose sum is σ = 1656297000. Its totient is φ = 828148496.

The previous prime is 1242222733. The next prime is 1242222763. The reversal of 1242222747 is 7472222421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7472222421 = 3 ⋅2490740807.

It is a cyclic number.

It is not a de Polignac number, because 1242222747 - 2²² = 1238028443 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1242222767) 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 3 ways as a sum of consecutive naturals, for example, 207037122 + ... + 207037127.

It is an arithmetic number, because the mean of its divisors is an integer number (414074250).

Almost surely, 2^1242222747 is an apocalyptic number.

1242222747 is a deficient number, since it is larger than the sum of its proper divisors (414074253).

1242222747 is an equidigital number, since it uses as much as digits as its factorization.

1242222747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 414074252.

The product of its digits is 25088, while the sum is 33.

The square root of 1242222747 is about 35245.1804790385. The cubic root of 1242222747 is about 1074.9786177827.

The spelling of 1242222747 in words is "one billion, two hundred forty-two million, two hundred twenty-two thousand, seven hundred forty-seven".