1154021 has 4 divisors (see below), whose sum is σ = 1258944. Its totient is φ = 1049100.

The previous prime is 1154017. The next prime is 1154029. The reversal of 1154021 is 1204511.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1154021 - 2² = 1154017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1153987 and 1154005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1154029) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52445 + ... + 52466.

It is an arithmetic number, because the mean of its divisors is an integer number (314736).

2^1154021 is an apocalyptic number.

1154021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1154021 is a deficient number, since it is larger than the sum of its proper divisors (104923).

1154021 is a wasteful number, since it uses less digits than its factorization.

1154021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104922.

The product of its (nonzero) digits is 40, while the sum is 14.

The square root of 1154021 is about 1074.2536944316. The cubic root of 1154021 is about 104.8909222507.

Adding to 1154021 its reverse (1204511), we get a palindrome (2358532).

The spelling of 1154021 in words is "one million, one hundred fifty-four thousand, twenty-one".