1275021 has 32 divisors (see below), whose sum is σ = 2125440. Its totient is φ = 758160.

The previous prime is 1275019. The next prime is 1275041. The reversal of 1275021 is 1205721.

It is not a de Polignac number, because 1275021 - 2¹ = 1275019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1274985 and 1275003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1275011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 24031 + ... + 24083.

It is an arithmetic number, because the mean of its divisors is an integer number (66420).

2^1275021 is an apocalyptic number.

1275021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1275021 is a deficient number, since it is larger than the sum of its proper divisors (850419).

1275021 is an frugal number, since it uses more digits than its factorization.

1275021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85 (or 67 counting only the distinct ones).

The product of its (nonzero) digits is 140, while the sum is 18.

The square root of 1275021 is about 1129.1682779816. The cubic root of 1275021 is about 108.4357395894.

The spelling of 1275021 in words is "one million, two hundred seventy-five thousand, twenty-one".