1320533451 has 6 divisors (see below), whose sum is σ = 1907437220. Its totient is φ = 880355628.

The previous prime is 1320533449. The next prime is 1320533471. The reversal of 1320533451 is 1543350231.

1320533451 is a `hidden beast` number, since 1 + 3 + 205 + 3 + 3 + 451 = 666.

It is not a de Polignac number, because 1320533451 - 2¹ = 1320533449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1320533411) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 73362961 + ... + 73362978.

Almost surely, 2^1320533451 is an apocalyptic number.

1320533451 is a deficient number, since it is larger than the sum of its proper divisors (586903769).

1320533451 is a wasteful number, since it uses less digits than its factorization.

1320533451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146725945 (or 146725942 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 27.

The square root of 1320533451 is about 36339.1448853712. The cubic root of 1320533451 is about 1097.1090620766.

Adding to 1320533451 its reverse (1543350231), we get a palindrome (2863883682).

It can be divided in two parts, 13205 and 33451, that added together give a 6-th power (46656 = 6⁶).

The spelling of 1320533451 in words is "one billion, three hundred twenty million, five hundred thirty-three thousand, four hundred fifty-one".