1272161066 has 8 divisors (see below), whose sum is σ = 2081718144. Its totient is φ = 578255020.

The previous prime is 1272161041. The next prime is 1272161069. The reversal of 1272161066 is 6601612721.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (1272161069) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28912730 + ... + 28912773.

It is an arithmetic number, because the mean of its divisors is an integer number (260214768).

Almost surely, 2^1272161066 is an apocalyptic number.

1272161066 is a deficient number, since it is larger than the sum of its proper divisors (809557078).

1272161066 is a wasteful number, since it uses less digits than its factorization.

1272161066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57825516.

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 1272161066 is about 35667.3669619724. The cubic root of 1272161066 is about 1083.5460335233.

Adding to 1272161066 its reverse (6601612721), we get a palindrome (7873773787).

The spelling of 1272161066 in words is "one billion, two hundred seventy-two million, one hundred sixty-one thousand, sixty-six".