1331420 has 12 divisors (see below), whose sum is σ = 2796024. Its totient is φ = 532560.

The previous prime is 1331411. The next prime is 1331431. The reversal of 1331420 is 241331.

It is a junction number, because it is equal to n+sod(n) for n = 1331395 and 1331404.

It is a congruent number.

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, 33266 + ... + 33305.

It is an arithmetic number, because the mean of its divisors is an integer number (233002).

2^1331420 is an apocalyptic number.

1331420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1331420 is an abundant number, since it is smaller than the sum of its proper divisors (1464604).

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

1331420 is a wasteful number, since it uses less digits than its factorization.

1331420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66580 (or 66578 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 1331420 is about 1153.8717433060. The cubic root of 1331420 is about 110.0115690311.

Adding to 1331420 its reverse (241331), we get a palindrome (1572751).

The spelling of 1331420 in words is "one million, three hundred thirty-one thousand, four hundred twenty".