1356499305 has 40 divisors (see below), whose sum is σ = 2779035072. Its totient is φ = 620112672.

The previous prime is 1356499303. The next prime is 1356499349. The reversal of 1356499305 is 5039946531.

It is not a de Polignac number, because 1356499305 - 2¹ = 1356499303 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (1356499301) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 236407 + ... + 242076.

Almost surely, 2^1356499305 is an apocalyptic number.

1356499305 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1356499305 is an abundant number, since it is smaller than the sum of its proper divisors (1422535767).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1356499305 is an equidigital number, since it uses as much as digits as its factorization.

1356499305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 478507 (or 478498 counting only the distinct ones).

The product of its (nonzero) digits is 437400, while the sum is 45.

The square root of 1356499305 is about 36830.6842863393. The cubic root of 1356499305 is about 1106.9802142453.

The spelling of 1356499305 in words is "one billion, three hundred fifty-six million, four hundred ninety-nine thousand, three hundred five".