1272122670 has 128 divisors (see below), whose sum is σ = 3819755520. Its totient is φ = 263969280.

The previous prime is 1272122669. The next prime is 1272122681. The reversal of 1272122670 is 762212721.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 162711 + ... + 170349.

It is an arithmetic number, because the mean of its divisors is an integer number (29841840).

Almost surely, 2^1272122670 is an apocalyptic number.

1272122670 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1272122670, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1909877760).

1272122670 is an abundant number, since it is smaller than the sum of its proper divisors (2547632850).

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

1272122670 is a wasteful number, since it uses less digits than its factorization.

1272122670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7730.

The product of its (nonzero) digits is 4704, while the sum is 30.

The square root of 1272122670 is about 35666.8287067970. The cubic root of 1272122670 is about 1083.5351323219.

The spelling of 1272122670 in words is "one billion, two hundred seventy-two million, one hundred twenty-two thousand, six hundred seventy".