1157121 has 12 divisors (see below), whose sum is σ = 1910272. Its totient is φ = 661176.

The previous prime is 1157111. The next prime is 1157131. The reversal of 1157121 is 1217511.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1157111) and next prime (1157131).

It is not a de Polignac number, because 1157121 - 2¹⁰ = 1156097 is a prime.

1157121 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 1157094 and 1157103.

It is not an unprimeable number, because it can be changed into a prime (1157111) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9121 + ... + 9246.

It is a Proth number, since it is equal to 565 ⋅ 2¹¹ + 1 and 565 < 2¹¹.

2^1157121 is an apocalyptic number.

It is an amenable number.

1157121 is a deficient number, since it is larger than the sum of its proper divisors (753151).

1157121 is a wasteful number, since it uses less digits than its factorization.

1157121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18380 (or 18377 counting only the distinct ones).

The product of its digits is 70, while the sum is 18.

The square root of 1157121 is about 1075.6955889098. The cubic root of 1157121 is about 104.9847596928.

The spelling of 1157121 in words is "one million, one hundred fifty-seven thousand, one hundred twenty-one".