1272420160 has 112 divisors (see below), whose sum is σ = 3322271232. Its totient is φ = 460339200.

The previous prime is 1272420109. The next prime is 1272420179. The reversal of 1272420160 is 610242721.

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, 784150 + ... + 785770.

It is an arithmetic number, because the mean of its divisors is an integer number (29663136).

Almost surely, 2^1272420160 is an apocalyptic number.

1272420160 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1272420160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1661135616).

1272420160 is an abundant number, since it is smaller than the sum of its proper divisors (2049851072).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1272420160 is a wasteful number, since it uses less digits than its factorization.

1272420160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1872 (or 1862 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 1272420160 is about 35670.9988646239. The cubic root of 1272420160 is about 1083.6195884703.

Adding to 1272420160 its reverse (610242721), we get a palindrome (1882662881).

The spelling of 1272420160 in words is "one billion, two hundred seventy-two million, four hundred twenty thousand, one hundred sixty".