1305451340 has 24 divisors (see below), whose sum is σ = 2742199152. Its totient is φ = 522037440.

The previous prime is 1305451339. The next prime is 1305451387. The reversal of 1305451340 is 431545031.

It is a super-2 number, since 2×1305451340² = 3408406402215591200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 95750 + ... + 108530.

It is an arithmetic number, because the mean of its divisors is an integer number (114258298).

Almost surely, 2^1305451340 is an apocalyptic number.

1305451340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1305451340 is an abundant number, since it is smaller than the sum of its proper divisors (1436747812).

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

1305451340 is a wasteful number, since it uses less digits than its factorization.

1305451340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17897 (or 17895 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 1305451340 is about 36131.0301541487. The cubic root of 1305451340 is about 1092.9162822495.

Adding to 1305451340 its reverse (431545031), we get a palindrome (1736996371).

The spelling of 1305451340 in words is "one billion, three hundred five million, four hundred fifty-one thousand, three hundred forty".