1362640 has 20 divisors (see below), whose sum is σ = 3168324. Its totient is φ = 545024.

The previous prime is 1362637. The next prime is 1362643. The reversal of 1362640 is 462631.

It is an interprime number because it is at equal distance from previous prime (1362637) and next prime (1362643).

It can be written as a sum of positive squares in 2 ways, for example, as 394384 + 968256 = 628^2 + 984^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1362643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8437 + ... + 8596.

2^1362640 is an apocalyptic number.

1362640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1362640 is an abundant number, since it is smaller than the sum of its proper divisors (1805684).

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

1362640 is a wasteful number, since it uses less digits than its factorization.

1362640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17046 (or 17040 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 1362640 is about 1167.3217208636. The cubic root of 1362640 is about 110.8648084927.

Subtracting from 1362640 its reverse (462631), we obtain a palindrome (900009).

It can be divided in two parts, 1362 and 640, that added together give a palindrome (2002).

The spelling of 1362640 in words is "one million, three hundred sixty-two thousand, six hundred forty".