1272214145 has 8 divisors (see below), whose sum is σ = 1526872680. Its totient is φ = 1017627520.

The previous prime is 1272214127. The next prime is 1272214169. The reversal of 1272214145 is 5414122721.

It can be written as a sum of positive squares in 4 ways, for example, as 7921 + 1272206224 = 89^2 + 35668^2 .

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

It is not a de Polignac number, because 1272214145 - 2¹⁶ = 1272148609 is a prime.

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, 35315 + ... + 61575.

It is an arithmetic number, because the mean of its divisors is an integer number (190859085).

Almost surely, 2^1272214145 is an apocalyptic number.

It is an amenable number.

1272214145 is a deficient number, since it is larger than the sum of its proper divisors (254658535).

1272214145 is an equidigital number, since it uses as much as digits as its factorization.

1272214145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35955.

The product of its digits is 4480, while the sum is 29.

The square root of 1272214145 is about 35668.1110377323. Note that the first 3 decimals coincide. The cubic root of 1272214145 is about 1083.5611030879.

Adding to 1272214145 its reverse (5414122721), we get a palindrome (6686336866).

The spelling of 1272214145 in words is "one billion, two hundred seventy-two million, two hundred fourteen thousand, one hundred forty-five".