1272385106 has 4 divisors (see below), whose sum is σ = 1908577662. Its totient is φ = 636192552.

The previous prime is 1272385099. The next prime is 1272385123. The reversal of 1272385106 is 6015832721.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6015832721 = 17 ⋅353872513.

It can be written as a sum of positive squares in only one way, i.e., 988159225 + 284225881 = 31435^2 + 16859^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 318096275 + ... + 318096278.

Almost surely, 2^1272385106 is an apocalyptic number.

1272385106 is a deficient number, since it is larger than the sum of its proper divisors (636192556).

1272385106 is an equidigital number, since it uses as much as digits as its factorization.

1272385106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 636192555.

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 1272385106 is about 35670.5075097061. The cubic root of 1272385106 is about 1083.6096374727.

The spelling of 1272385106 in words is "one billion, two hundred seventy-two million, three hundred eighty-five thousand, one hundred six".