1371620 has 12 divisors (see below), whose sum is σ = 2880444. Its totient is φ = 548640.

The previous prime is 1371619. The next prime is 1371641. The reversal of 1371620 is 261731.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 399424 + 972196 = 632^2 + 986^2 .

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 68581 = 1371620 / (1 + 3 + 7 + 1 + 6 + 2 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 1371592 and 1371601.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34271 + ... + 34310.

It is an arithmetic number, because the mean of its divisors is an integer number (240037).

2^1371620 is an apocalyptic number.

1371620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1371620 is an abundant number, since it is smaller than the sum of its proper divisors (1508824).

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

1371620 is a wasteful number, since it uses less digits than its factorization.

1371620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68590 (or 68588 counting only the distinct ones).

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

The square root of 1371620 is about 1171.1618163175. The cubic root of 1371620 is about 111.1078139762.

It can be divided in two parts, 1371 and 620, that added together give a palindrome (1991).

The spelling of 1371620 in words is "one million, three hundred seventy-one thousand, six hundred twenty".