1021275 has 48 divisors (see below), whose sum is σ = 2008800. Its totient is φ = 506880.

The previous prime is 1021271. The next prime is 1021283. The reversal of 1021275 is 5721201.

It is not a de Polignac number, because 1021275 - 2² = 1021271 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1021271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 11431 + ... + 11519.

It is an arithmetic number, because the mean of its divisors is an integer number (41850).

2^1021275 is an apocalyptic number.

1021275 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1021275 is a deficient number, since it is larger than the sum of its proper divisors (987525).

1021275 is a wasteful number, since it uses less digits than its factorization.

1021275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125 (or 114 counting only the distinct ones).

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

The square root of 1021275 is about 1010.5815157621. The cubic root of 1021275 is about 100.7041961049.

Adding to 1021275 its reverse (5721201), we get a palindrome (6742476).

It can be divided in two parts, 1021 and 275, that added together give a 4-th power (1296 = 6⁴).

The spelling of 1021275 in words is "one million, twenty-one thousand, two hundred seventy-five".