1145021 has 2 divisors, whose sum is σ = 1145022. Its totient is φ = 1145020.

The previous prime is 1145003. The next prime is 1145057. The reversal of 1145021 is 1205411.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1144900 + 121 = 1070^2 + 11^2 .

It is an emirp because it is prime and its reverse (1205411) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1145021 - 2¹⁴ = 1128637 is a prime.

It is a super-2 number, since 2×1145021² = 2622146180882, which contains 22 as substring.

It is a plaindrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 1144987 and 1145005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1145621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 572510 + 572511.

It is an arithmetic number, because the mean of its divisors is an integer number (572511).

2^1145021 is an apocalyptic number.

It is an amenable number.

1145021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1145021 is an equidigital number, since it uses as much as digits as its factorization.

1145021 is an evil number, because the sum of its binary digits is even.

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

The square root of 1145021 is about 1070.0565405622. The cubic root of 1145021 is about 104.6175352372.

The spelling of 1145021 in words is "one million, one hundred forty-five thousand, twenty-one".