1251157 has 2 divisors, whose sum is σ = 1251158. Its totient is φ = 1251156.

The previous prime is 1251121. The next prime is 1251161. The reversal of 1251157 is 7511521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1012036 + 239121 = 1006^2 + 489^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1251157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1251857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 625578 + 625579.

It is an arithmetic number, because the mean of its divisors is an integer number (625579).

2^1251157 is an apocalyptic number.

It is an amenable number.

1251157 is a deficient number, since it is larger than the sum of its proper divisors (1).

1251157 is an equidigital number, since it uses as much as digits as its factorization.

1251157 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 350, while the sum is 22.

The square root of 1251157 is about 1118.5512952029. The cubic root of 1251157 is about 107.7549599983.

Adding to 1251157 its reverse (7511521), we get a palindrome (8762678).

The spelling of 1251157 in words is "one million, two hundred fifty-one thousand, one hundred fifty-seven".