1121869 has 8 divisors (see below), whose sum is σ = 1292480. Its totient is φ = 953856.

The previous prime is 1121867. The next prime is 1121899. The reversal of 1121869 is 9681211.

It is a happy number.

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 1121869 - 2¹ = 1121867 is a prime.

It is a super-2 number, since 2×1121869² = 2517180106322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121867) 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, 397 + ... + 1549.

It is an arithmetic number, because the mean of its divisors is an integer number (161560).

2^1121869 is an apocalyptic number.

It is an amenable number.

1121869 is a deficient number, since it is larger than the sum of its proper divisors (170611).

1121869 is a wasteful number, since it uses less digits than its factorization.

1121869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1299.

The product of its digits is 864, while the sum is 28.

The square root of 1121869 is about 1059.1831758483. The cubic root of 1121869 is about 103.9076164310.

The spelling of 1121869 in words is "one million, one hundred twenty-one thousand, eight hundred sixty-nine".