1340557505 has 16 divisors (see below), whose sum is σ = 1839110400. Its totient is φ = 918923712.

The previous prime is 1340557481. The next prime is 1340557513. The reversal of 1340557505 is 5057550431.

It is not a de Polignac number, because 1340557505 - 2⁶ = 1340557441 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 147812 + ... + 156618.

It is an arithmetic number, because the mean of its divisors is an integer number (114944400).

Almost surely, 2^1340557505 is an apocalyptic number.

It is an amenable number.

1340557505 is a deficient number, since it is larger than the sum of its proper divisors (498552895).

1340557505 is an equidigital number, since it uses as much as digits as its factorization.

1340557505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13168.

The product of its (nonzero) digits is 52500, while the sum is 35.

The square root of 1340557505 is about 36613.6245815680. The cubic root of 1340557505 is about 1102.6266444399.

The spelling of 1340557505 in words is "one billion, three hundred forty million, five hundred fifty-seven thousand, five hundred five".