1153971 has 24 divisors (see below), whose sum is σ = 2052960. Its totient is φ = 608256.

The previous prime is 1153967. The next prime is 1153973. The reversal of 1153971 is 1793511.

It is a happy number.

It is not a de Polignac number, because 1153971 - 2² = 1153967 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1153973) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 115 + ... + 1523.

It is an arithmetic number, because the mean of its divisors is an integer number (85540).

2^1153971 is an apocalyptic number.

1153971 is a deficient number, since it is larger than the sum of its proper divisors (898989).

1153971 is a wasteful number, since it uses less digits than its factorization.

1153971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1435 (or 1432 counting only the distinct ones).

The product of its digits is 945, while the sum is 27.

The square root of 1153971 is about 1074.2304222093. The cubic root of 1153971 is about 104.8894073673.

The spelling of 1153971 in words is "one million, one hundred fifty-three thousand, nine hundred seventy-one".