1340652645 has 24 divisors (see below), whose sum is σ = 2380479192. Its totient is φ = 697574400.

The previous prime is 1340652631. The next prime is 1340652671. The reversal of 1340652645 is 5462560431.

1340652645 is a `hidden beast` number, since 1 + 3 + 4 + 0 + 6 + 5 + 2 + 645 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 5919489 + 1334733156 = 2433^2 + 36534^2 .

It is not a de Polignac number, because 1340652645 - 2¹⁵ = 1340619877 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 361476 + ... + 365165.

It is an arithmetic number, because the mean of its divisors is an integer number (99186633).

Almost surely, 2^1340652645 is an apocalyptic number.

1340652645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1340652645 is a deficient number, since it is larger than the sum of its proper divisors (1039826547).

1340652645 is a wasteful number, since it uses less digits than its factorization.

1340652645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 726693 (or 726690 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 36.

The square root of 1340652645 is about 36614.9238016413. The cubic root of 1340652645 is about 1102.6527284676.

The spelling of 1340652645 in words is "one billion, three hundred forty million, six hundred fifty-two thousand, six hundred forty-five".