1311930 has 64 divisors (see below), whose sum is σ = 3611520. Its totient is φ = 338688.

The previous prime is 1311923. The next prime is 1311967. The reversal of 1311930 is 391131.

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

It is an Ulam number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11554 + ... + 11666.

It is an arithmetic number, because the mean of its divisors is an integer number (56430).

2^1311930 is an apocalyptic number.

1311930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1311930, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1805760).

1311930 is an abundant number, since it is smaller than the sum of its proper divisors (2299590).

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

1311930 is a wasteful number, since it uses less digits than its factorization.

1311930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172 (or 166 counting only the distinct ones).

The product of its (nonzero) digits is 81, while the sum is 18.

The square root of 1311930 is about 1145.3951283291. The cubic root of 1311930 is about 109.4721265139.

The spelling of 1311930 in words is "one million, three hundred eleven thousand, nine hundred thirty".