1351800 has 72 divisors (see below), whose sum is σ = 4545840. Its totient is φ = 360000.

The previous prime is 1351799. The next prime is 1351813. The reversal of 1351800 is 81531.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1425 + ... + 2175.

2^1351800 is an apocalyptic number.

1351800 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 1351800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2272920).

1351800 is an abundant number, since it is smaller than the sum of its proper divisors (3194040).

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

1351800 is a wasteful number, since it uses less digits than its factorization.

1351800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 773 (or 761 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 1351800 is about 1162.6693425046. The cubic root of 1351800 is about 110.5700435641.

The spelling of 1351800 in words is "one million, three hundred fifty-one thousand, eight hundred".