1115421 has 8 divisors (see below), whose sum is σ = 1574784. Its totient is φ = 699840.

The previous prime is 1115419. The next prime is 1115447. The reversal of 1115421 is 1245111.

It is a happy number.

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

It is not a de Polignac number, because 1115421 - 2¹ = 1115419 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1115421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1115321) 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, 10885 + ... + 10986.

It is an arithmetic number, because the mean of its divisors is an integer number (196848).

2^1115421 is an apocalyptic number.

It is an amenable number.

1115421 is a deficient number, since it is larger than the sum of its proper divisors (459363).

1115421 is a wasteful number, since it uses less digits than its factorization.

1115421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21891.

The product of its digits is 40, while the sum is 15.

The square root of 1115421 is about 1056.1349345609. The cubic root of 1115421 is about 103.7081623540.

It can be divided in two parts, 11154 and 21, that added together give a triangular number (11175 = T₁₄₉).

The spelling of 1115421 in words is "one million, one hundred fifteen thousand, four hundred twenty-one".