1351240240 has 80 divisors (see below), whose sum is σ = 3801667392. Its totient is φ = 436027392.

The previous prime is 1351240237. The next prime is 1351240273. The reversal of 1351240240 is 420421531.

It is a tau number, because it is divible by the number of its divisors (80).

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, 61449 + ... + 80488.

Almost surely, 2^1351240240 is an apocalyptic number.

1351240240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1351240240 is an abundant number, since it is smaller than the sum of its proper divisors (2450427152).

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

1351240240 is a wasteful number, since it uses less digits than its factorization.

1351240240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141974 (or 141968 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 1351240240 is about 36759.2197958553. The cubic root of 1351240240 is about 1105.5477966099.

Adding to 1351240240 its reverse (420421531), we get a palindrome (1771661771).

The spelling of 1351240240 in words is "one billion, three hundred fifty-one million, two hundred forty thousand, two hundred forty".