1273276161 has 6 divisors (see below), whose sum is σ = 1839176690. Its totient is φ = 848850768.

The previous prime is 1273276133. The next prime is 1273276163. The reversal of 1273276161 is 1616723721.

It is a happy number.

1273276161 is a `hidden beast` number, since 1 + 2 + 7 + 32 + 7 + 616 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 770395536 + 502880625 = 27756^2 + 22425^2 .

It is not a de Polignac number, because 1273276161 - 2¹⁵ = 1273243393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1273276163) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 70737556 + ... + 70737573.

Almost surely, 2^1273276161 is an apocalyptic number.

It is an amenable number.

1273276161 is a deficient number, since it is larger than the sum of its proper divisors (565900529).

1273276161 is a wasteful number, since it uses less digits than its factorization.

1273276161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141475135 (or 141475132 counting only the distinct ones).

The product of its digits is 21168, while the sum is 36.

The square root of 1273276161 is about 35682.9954039736. The cubic root of 1273276161 is about 1083.8625301110.

Adding to 1273276161 its reverse (1616723721), we get a palindrome (2889999882).

The spelling of 1273276161 in words is "one billion, two hundred seventy-three million, two hundred seventy-six thousand, one hundred sixty-one".