1361620 has 24 divisors (see below), whose sum is σ = 3079944. Its totient is φ = 502656.

The previous prime is 1361609. The next prime is 1361629. The reversal of 1361620 is 261631.

It can be written as a sum of positive squares in 4 ways, for example, as 138384 + 1223236 = 372^2 + 1106^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1361629) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2359 + ... + 2878.

It is an arithmetic number, because the mean of its divisors is an integer number (128331).

2^1361620 is an apocalyptic number.

1361620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1361620 is an abundant number, since it is smaller than the sum of its proper divisors (1718324).

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

1361620 is a wasteful number, since it uses less digits than its factorization.

1361620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5259 (or 5257 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 1361620 is about 1166.8847415233. The cubic root of 1361620 is about 110.8371390833.

The spelling of 1361620 in words is "one million, three hundred sixty-one thousand, six hundred twenty".