1321275 has 24 divisors (see below), whose sum is σ = 2222080. Its totient is φ = 692640.

The previous prime is 1321273. The next prime is 1321283. The reversal of 1321275 is 5721231.

It is not a de Polignac number, because 1321275 - 2¹ = 1321273 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1321273) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5814 + ... + 6036.

2^1321275 is an apocalyptic number.

1321275 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1321275 is a deficient number, since it is larger than the sum of its proper divisors (900805).

1321275 is a wasteful number, since it uses less digits than its factorization.

1321275 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315 (or 310 counting only the distinct ones).

The product of its digits is 420, while the sum is 21.

The square root of 1321275 is about 1149.4672679115. The cubic root of 1321275 is about 109.7314385132.

It can be divided in two parts, 1321 and 275, that added together give a triangular number (1596 = T₅₆).

The spelling of 1321275 in words is "one million, three hundred twenty-one thousand, two hundred seventy-five".