1153997 has 8 divisors (see below), whose sum is σ = 1286040. Its totient is φ = 1028160.

The previous prime is 1153973. The next prime is 1154017. The reversal of 1153997 is 7993511.

It can be written as a sum of positive squares in 4 ways, for example, as 259081 + 894916 = 509^2 + 946^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1153997 - 2¹² = 1149901 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1153967) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1154 + ... + 1907.

It is an arithmetic number, because the mean of its divisors is an integer number (160755).

2^1153997 is an apocalyptic number.

It is an amenable number.

1153997 is a deficient number, since it is larger than the sum of its proper divisors (132043).

1153997 is a wasteful number, since it uses less digits than its factorization.

1153997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3103.

The product of its digits is 8505, while the sum is 35.

The square root of 1153997 is about 1074.2425238278. The cubic root of 1153997 is about 104.8901951121.

The spelling of 1153997 in words is "one million, one hundred fifty-three thousand, nine hundred ninety-seven".