1272151 has 2 divisors, whose sum is σ = 1272152. Its totient is φ = 1272150.

The previous prime is 1272133. The next prime is 1272157. The reversal of 1272151 is 1512721.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1272151 - 2¹¹ = 1270103 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1272157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 636075 + 636076.

It is an arithmetic number, because the mean of its divisors is an integer number (636076).

2^1272151 is an apocalyptic number.

1272151 is a deficient number, since it is larger than the sum of its proper divisors (1).

1272151 is an equidigital number, since it uses as much as digits as its factorization.

1272151 is an evil number, because the sum of its binary digits is even.

The product of its digits is 140, while the sum is 19.

The square root of 1272151 is about 1127.8967151295. The cubic root of 1272151 is about 108.3543175656.

Adding to 1272151 its reverse (1512721), we get a palindrome (2784872).

It can be divided in two parts, 127 and 2151, that added together give a triangular number (2278 = T₆₇).

The spelling of 1272151 in words is "one million, two hundred seventy-two thousand, one hundred fifty-one".