1351057240 has 64 divisors (see below), whose sum is σ = 3279800160. Its totient is φ = 497925120.

The previous prime is 1351057231. The next prime is 1351057243. The reversal of 1351057240 is 427501531.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1351057199 and 1351057208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1351057243) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 318735 + ... + 322945.

Almost surely, 2^1351057240 is an apocalyptic number.

1351057240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1351057240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1639900080).

1351057240 is an abundant number, since it is smaller than the sum of its proper divisors (1928742920).

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

1351057240 is a wasteful number, since it uses less digits than its factorization.

1351057240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4852 (or 4848 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 28.

The square root of 1351057240 is about 36756.7305401337. The cubic root of 1351057240 is about 1105.4978858255.

Adding to 1351057240 its reverse (427501531), we get a palindrome (1778558771).

The spelling of 1351057240 in words is "one billion, three hundred fifty-one million, fifty-seven thousand, two hundred forty".