1320451 has 4 divisors (see below), whose sum is σ = 1440504. Its totient is φ = 1200400.

The previous prime is 1320437. The next prime is 1320533. The reversal of 1320451 is 1540231.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1320451 - 2¹⁵ = 1287683 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1320421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60010 + ... + 60031.

It is an arithmetic number, because the mean of its divisors is an integer number (360126).

2^1320451 is an apocalyptic number.

1320451 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1320451 is a deficient number, since it is larger than the sum of its proper divisors (120053).

1320451 is a wasteful number, since it uses less digits than its factorization.

1320451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120052.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 1320451 is about 1149.1087851026. The cubic root of 1320451 is about 109.7086227966.

Adding to 1320451 its reverse (1540231), we get a palindrome (2860682).

It can be divided in two parts, 1320 and 451, that added together give a palindrome (1771).

The spelling of 1320451 in words is "one million, three hundred twenty thousand, four hundred fifty-one".