1272545670 has 32 divisors (see below), whose sum is σ = 3331756800. Its totient is φ = 308495840.

The previous prime is 1272545669. The next prime is 1272545711. The reversal of 1272545670 is 765452721.

It is an alternating number because its digits alternate between odd and even.

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, 1927770 + ... + 1928429.

It is an arithmetic number, because the mean of its divisors is an integer number (104117400).

Almost surely, 2^1272545670 is an apocalyptic number.

1272545670 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1272545670 is an abundant number, since it is smaller than the sum of its proper divisors (2059211130).

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

1272545670 is a wasteful number, since it uses less digits than its factorization.

1272545670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3856220.

The product of its (nonzero) digits is 117600, while the sum is 39.

The square root of 1272545670 is about 35672.7580935369. The cubic root of 1272545670 is about 1083.6552162782.

The spelling of 1272545670 in words is "one billion, two hundred seventy-two million, five hundred forty-five thousand, six hundred seventy".