1321066 has 8 divisors (see below), whose sum is σ = 2050020. Its totient is φ = 637728.

The previous prime is 1321063. The next prime is 1321079. The reversal of 1321066 is 6601231.

It can be written as a sum of positive squares in 2 ways, for example, as 1243225 + 77841 = 1115^2 + 279^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (1321063) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11331 + ... + 11446.

2^1321066 is an apocalyptic number.

1321066 is a deficient number, since it is larger than the sum of its proper divisors (728954).

1321066 is a wasteful number, since it uses less digits than its factorization.

1321066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22808.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 1321066 is about 1149.3763526365. The cubic root of 1321066 is about 109.7256524152.

Adding to 1321066 its reverse (6601231), we get a palindrome (7922297).

It can be divided in two parts, 13210 and 66, that multiplied together give a triangular number (871860 = T₁₃₂₀).

The spelling of 1321066 in words is "one million, three hundred twenty-one thousand, sixty-six".