1272720022 has 32 divisors (see below), whose sum is σ = 2237760000. Its totient is φ = 542652264.

The previous prime is 1272719993. The next prime is 1272720023. The reversal of 1272720022 is 2200272721.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1272720023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 131853 + ... + 141175.

It is an arithmetic number, because the mean of its divisors is an integer number (69930000).

Almost surely, 2^1272720022 is an apocalyptic number.

1272720022 is a deficient number, since it is larger than the sum of its proper divisors (965039978).

1272720022 is an equidigital number, since it uses as much as digits as its factorization.

1272720022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9545 (or 9531 counting only the distinct ones).

The product of its (nonzero) digits is 1568, while the sum is 25.

The square root of 1272720022 is about 35675.2017793873. The cubic root of 1272720022 is about 1083.7047046988.

Adding to 1272720022 its reverse (2200272721), we get a palindrome (3472992743).

The spelling of 1272720022 in words is "one billion, two hundred seventy-two million, seven hundred twenty thousand, twenty-two".