1280498513 has 4 divisors (see below), whose sum is σ = 1463426880. Its totient is φ = 1097570148.

The previous prime is 1280498507. The next prime is 1280498533. The reversal of 1280498513 is 3158940821.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1280498513 - 2⁶ = 1280498449 is a prime.

It is a super-2 number, since 2×1280498513² = 3279352883590422338, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1280498533) 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, 91464173 + ... + 91464186.

It is an arithmetic number, because the mean of its divisors is an integer number (365856720).

Almost surely, 2^1280498513 is an apocalyptic number.

It is an amenable number.

1280498513 is a deficient number, since it is larger than the sum of its proper divisors (182928367).

1280498513 is an equidigital number, since it uses as much as digits as its factorization.

1280498513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182928366.

The product of its (nonzero) digits is 69120, while the sum is 41.

The square root of 1280498513 is about 35784.0538927607. The cubic root of 1280498513 is about 1085.9079838085.

The spelling of 1280498513 in words is "one billion, two hundred eighty million, four hundred ninety-eight thousand, five hundred thirteen".