1240463605 has 12 divisors (see below), whose sum is σ = 1538129196. Its totient is φ = 960355200.

The previous prime is 1240463593. The next prime is 1240463617. The reversal of 1240463605 is 5063640421.

It is an interprime number because it is at equal distance from previous prime (1240463593) and next prime (1240463617).

It can be written as a sum of positive squares in 2 ways, for example, as 874621476 + 365842129 = 29574^2 + 19127^2 .

It is not a de Polignac number, because 1240463605 - 2¹¹ = 1240461557 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 124276 + ... + 133885.

It is an arithmetic number, because the mean of its divisors is an integer number (128177433).

Almost surely, 2^1240463605 is an apocalyptic number.

It is an amenable number.

1240463605 is a deficient number, since it is larger than the sum of its proper divisors (297665591).

1240463605 is an equidigital number, since it uses as much as digits as its factorization.

1240463605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258228 (or 258197 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 1240463605 is about 35220.2158568059. The cubic root of 1240463605 is about 1074.4709435640.

The spelling of 1240463605 in words is "one billion, two hundred forty million, four hundred sixty-three thousand, six hundred five".