1201157 has 4 divisors (see below), whose sum is σ = 1239936. Its totient is φ = 1162380.

The previous prime is 1201153. The next prime is 1201163. The reversal of 1201157 is 7511021.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1201157 - 2² = 1201153 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19343 + ... + 19404.

It is an arithmetic number, because the mean of its divisors is an integer number (309984).

2^1201157 is an apocalyptic number.

It is an amenable number.

1201157 is a deficient number, since it is larger than the sum of its proper divisors (38779).

1201157 is an equidigital number, since it uses as much as digits as its factorization.

1201157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38778.

The product of its (nonzero) digits is 70, while the sum is 17.

The square root of 1201157 is about 1095.9730836111. The cubic root of 1201157 is about 106.2999986135.

Adding to 1201157 its reverse (7511021), we get a palindrome (8712178).

The spelling of 1201157 in words is "one million, two hundred one thousand, one hundred fifty-seven".