1299440455 has 4 divisors (see below), whose sum is σ = 1559328552. Its totient is φ = 1039552360.

The previous prime is 1299440437. The next prime is 1299440459. The reversal of 1299440455 is 5540449921.

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

It is not a de Polignac number, because 1299440455 - 2⁷ = 1299440327 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1299440459) 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, 129944041 + ... + 129944050.

It is an arithmetic number, because the mean of its divisors is an integer number (389832138).

Almost surely, 2^1299440455 is an apocalyptic number.

1299440455 is a deficient number, since it is larger than the sum of its proper divisors (259888097).

1299440455 is an equidigital number, since it uses as much as digits as its factorization.

1299440455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259888096.

The product of its (nonzero) digits is 259200, while the sum is 43.

The square root of 1299440455 is about 36047.7524264690. The cubic root of 1299440455 is about 1091.2362750949.

The spelling of 1299440455 in words is "one billion, two hundred ninety-nine million, four hundred forty thousand, four hundred fifty-five".