1351865620 has 48 divisors (see below), whose sum is σ = 3246566400. Its totient is φ = 463198464.

The previous prime is 1351865573. The next prime is 1351865621. The reversal of 1351865620 is 265681531.

It is a self number, because there is not a number n which added to its sum of digits gives 1351865620.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1351865621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 425277 + ... + 428443.

It is an arithmetic number, because the mean of its divisors is an integer number (67636800).

Almost surely, 2^1351865620 is an apocalyptic number.

1351865620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1351865620 is an abundant number, since it is smaller than the sum of its proper divisors (1894700780).

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

1351865620 is a wasteful number, since it uses less digits than its factorization.

1351865620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6232 (or 6230 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 37.

The square root of 1351865620 is about 36767.7252491910. The cubic root of 1351865620 is about 1105.7183265733.

The spelling of 1351865620 in words is "one billion, three hundred fifty-one million, eight hundred sixty-five thousand, six hundred twenty".