1140921 has 12 divisors (see below), whose sum is σ = 1745172. Its totient is φ = 715776.

The previous prime is 1140913. The next prime is 1140929. The reversal of 1140921 is 1290411.

It is an interprime number because it is at equal distance from previous prime (1140913) and next prime (1140929).

It can be written as a sum of positive squares in 2 ways, for example, as 622521 + 518400 = 789^2 + 720^2 .

It is not a de Polignac number, because 1140921 - 2³ = 1140913 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1140894 and 1140903.

It is not an unprimeable number, because it can be changed into a prime (1140929) 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, 3576 + ... + 3881.

It is an arithmetic number, because the mean of its divisors is an integer number (145431).

2^1140921 is an apocalyptic number.

It is an amenable number.

1140921 is a deficient number, since it is larger than the sum of its proper divisors (604251).

1140921 is a wasteful number, since it uses less digits than its factorization.

1140921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7480 (or 7477 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

The square root of 1140921 is about 1068.1390358937. The cubic root of 1140921 is about 104.4925171874.

The spelling of 1140921 in words is "one million, one hundred forty thousand, nine hundred twenty-one".