1152021 has 16 divisors (see below), whose sum is σ = 1675520.
Its totient is φ = 699840.
The previous prime is 1151999. The next prime is 1152023. The reversal of 1152021 is 1202511.
It is not a de Polignac number, because 1152021 - 213 = 1143829 is a prime.
It is a Duffinian number.
It is a junction number, because it is equal to n+sod(n) for n = 1151988 and 1152006.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (1152023) by changing a digit.
It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4116 + ... + 4386.
It is an arithmetic number, because the mean of its divisors is an integer number (104720).
21152021 is an apocalyptic number.
It is an amenable number.
1152021 is a deficient number, since it is larger than the sum of its proper divisors (523499).
1152021 is a wasteful number, since it uses less digits than its factorization.
1152021 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 396.
The product of its (nonzero) digits is 20, while the sum is 12.
The square root of 1152021 is about 1073.3224119527.
The cubic root of 1152021 is about 104.8302927502.
Adding to 1152021 its reverse (1202511), we get a palindrome (2354532).
The spelling of 1152021 in words is "one million, one hundred fifty-two thousand, twenty-one".