1272005366 has 16 divisors (see below), whose sum is σ = 1991919600. Its totient is φ = 608434848.

The previous prime is 1272005359. The next prime is 1272005377. The reversal of 1272005366 is 6635002721.

It is a super-2 number, since 2×1272005366² = 3235995302265587912, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 94280 + ... + 106923.

It is an arithmetic number, because the mean of its divisors is an integer number (124494975).

Almost surely, 2^1272005366 is an apocalyptic number.

1272005366 is a deficient number, since it is larger than the sum of its proper divisors (719914234).

1272005366 is a wasteful number, since it uses less digits than its factorization.

1272005366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201343.

The product of its (nonzero) digits is 15120, while the sum is 32.

The square root of 1272005366 is about 35665.1842277591. The cubic root of 1272005366 is about 1083.5018265946.

The spelling of 1272005366 in words is "one billion, two hundred seventy-two million, five thousand, three hundred sixty-six".