1271157 has 16 divisors (see below), whose sum is σ = 1848000. Its totient is φ = 774144.

The previous prime is 1271147. The next prime is 1271161. The reversal of 1271157 is 7511721.

It is a happy number.

It is not a de Polignac number, because 1271157 - 2⁷ = 1271029 is a prime.

1271157 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1271117) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1269 + ... + 2037.

It is an arithmetic number, because the mean of its divisors is an integer number (115500).

2^1271157 is an apocalyptic number.

It is an amenable number.

1271157 is a deficient number, since it is larger than the sum of its proper divisors (576843).

1271157 is a wasteful number, since it uses less digits than its factorization.

1271157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 820.

The product of its digits is 490, while the sum is 24.

The square root of 1271157 is about 1127.4559858371. The cubic root of 1271157 is about 108.3260891934.

Adding to 1271157 its reverse (7511721), we get a palindrome (8782878).

The spelling of 1271157 in words is "one million, two hundred seventy-one thousand, one hundred fifty-seven".