1340245240 has 16 divisors (see below), whose sum is σ = 3015551880. Its totient is φ = 536098080.

The previous prime is 1340245229. The next prime is 1340245241. The reversal of 1340245240 is 425420431.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1340245241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16753026 + ... + 16753105.

Almost surely, 2^1340245240 is an apocalyptic number.

1340245240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1340245240 is an abundant number, since it is smaller than the sum of its proper divisors (1675306640).

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

1340245240 is a wasteful number, since it uses less digits than its factorization.

1340245240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33506142 (or 33506138 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 1340245240 is about 36609.3600053320. The cubic root of 1340245240 is about 1102.5410237322.

Adding to 1340245240 its reverse (425420431), we get a palindrome (1765665671).

The spelling of 1340245240 in words is "one billion, three hundred forty million, two hundred forty-five thousand, two hundred forty".