1272285541 has 2 divisors, whose sum is σ = 1272285542. Its totient is φ = 1272285540.

The previous prime is 1272285463. The next prime is 1272285551. The reversal of 1272285541 is 1455822721.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1243620225 + 28665316 = 35265^2 + 5354^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1272285541 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1272285541.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1272285551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 636142770 + 636142771.

It is an arithmetic number, because the mean of its divisors is an integer number (636142771).

Almost surely, 2^1272285541 is an apocalyptic number.

It is an amenable number.

1272285541 is a deficient number, since it is larger than the sum of its proper divisors (1).

1272285541 is an equidigital number, since it uses as much as digits as its factorization.

1272285541 is an evil number, because the sum of its binary digits is even.

The product of its digits is 44800, while the sum is 37.

The square root of 1272285541 is about 35669.1118616654. Note that the first 3 decimals coincide. The cubic root of 1272285541 is about 1083.5813723383.

The spelling of 1272285541 in words is "one billion, two hundred seventy-two million, two hundred eighty-five thousand, five hundred forty-one".