1136721 has 8 divisors (see below), whose sum is σ = 1526400. Its totient is φ = 752432.

The previous prime is 1136719. The next prime is 1136741. The reversal of 1136721 is 1276311.

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 1136721 - 2¹ = 1136719 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1136741) 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, 825 + ... + 1718.

It is an arithmetic number, because the mean of its divisors is an integer number (190800).

2^1136721 is an apocalyptic number.

It is an amenable number.

1136721 is a deficient number, since it is larger than the sum of its proper divisors (389679).

1136721 is a wasteful number, since it uses less digits than its factorization.

1136721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2695.

The product of its digits is 252, while the sum is 21.

The square root of 1136721 is about 1066.1711870052. The cubic root of 1136721 is about 104.3641389729.

The spelling of 1136721 in words is "one million, one hundred thirty-six thousand, seven hundred twenty-one".