1326420 has 36 divisors (see below), whose sum is σ = 4024020. Its totient is φ = 353664.

The previous prime is 1326419. The next prime is 1326427. The reversal of 1326420 is 246231.

Added to its reverse (246231) it gives a triangular number (1572651 = T₁₇₇₃).

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 898704 + 427716 = 948^2 + 654^2 .

It is a tau number, because it is divible by the number of its divisors (36).

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

It is a junction number, because it is equal to n+sod(n) for n = 1326393 and 1326402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1326427) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3505 + ... + 3864.

2^1326420 is an apocalyptic number.

1326420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1326420 is an abundant number, since it is smaller than the sum of its proper divisors (2697600).

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

1326420 is a wasteful number, since it uses less digits than its factorization.

1326420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7384 (or 7379 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 1326420 is about 1151.7030867372. The cubic root of 1326420 is about 109.8736842050.

Adding to 1326420 its reverse (246231), we get a triangular number (1572651 = T₁₇₇₃).

The spelling of 1326420 in words is "one million, three hundred twenty-six thousand, four hundred twenty".