1361720 has 32 divisors (see below), whose sum is σ = 3121200. Its totient is φ = 534528.

The previous prime is 1361713. The next prime is 1361741. The reversal of 1361720 is 271631.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 1361692 and 1361701.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2072 + ... + 2648.

2^1361720 is an apocalyptic number.

1361720 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 1361720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1560600).

1361720 is an abundant number, since it is smaller than the sum of its proper divisors (1759480).

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

1361720 is a wasteful number, since it uses less digits than its factorization.

1361720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 647 (or 643 counting only the distinct ones).

The product of its (nonzero) digits is 252, while the sum is 20.

The square root of 1361720 is about 1166.9275898701. The cubic root of 1361720 is about 110.8398523813.

1361720 divided by its sum of digits (20) gives a palindrome (68086).

The spelling of 1361720 in words is "one million, three hundred sixty-one thousand, seven hundred twenty".