1331870 has 8 divisors (see below), whose sum is σ = 2397384. Its totient is φ = 532744.

The previous prime is 1331857. The next prime is 1331921. The reversal of 1331870 is 781331.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

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, 66584 + ... + 66603.

It is an arithmetic number, because the mean of its divisors is an integer number (299673).

2^1331870 is an apocalyptic number.

1331870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1331870 is a deficient number, since it is larger than the sum of its proper divisors (1065514).

1331870 is a wasteful number, since it uses less digits than its factorization.

1331870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133194.

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 1331870 is about 1154.0667225078. The cubic root of 1331870 is about 110.0239617221.

The spelling of 1331870 in words is "one million, three hundred thirty-one thousand, eight hundred seventy".