1272122376 has 128 divisors (see below), whose sum is σ = 3868508160. Its totient is φ = 340300800.

The previous prime is 1272122339. The next prime is 1272122389. The reversal of 1272122376 is 6732212721.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 601561 + ... + 603671.

It is an arithmetic number, because the mean of its divisors is an integer number (30222720).

Almost surely, 2^1272122376 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1272122376, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1934254080).

1272122376 is an abundant number, since it is smaller than the sum of its proper divisors (2596385784).

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

1272122376 is a wasteful number, since it uses less digits than its factorization.

1272122376 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2355 (or 2351 counting only the distinct ones).

The product of its digits is 14112, while the sum is 33.

The square root of 1272122376 is about 35666.8245853202. The cubic root of 1272122376 is about 1083.5350488500.

The spelling of 1272122376 in words is "one billion, two hundred seventy-two million, one hundred twenty-two thousand, three hundred seventy-six".