1380312 has 48 divisors (see below), whose sum is σ = 3939000. Its totient is φ = 435456.

The previous prime is 1380307. The next prime is 1380317. The reversal of 1380312 is 2130831.

It is an interprime number because it is at equal distance from previous prime (1380307) and next prime (1380317).

It is a super-2 number, since 2×1380312² = 3810522434688, which contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1380317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 864 + ... + 1872.

2^1380312 is an apocalyptic number.

1380312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1380312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1969500).

1380312 is an abundant number, since it is smaller than the sum of its proper divisors (2558688).

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

1380312 is a wasteful number, since it uses less digits than its factorization.

1380312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1040 (or 1033 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 1380312 is about 1174.8668009609. The cubic root of 1380312 is about 111.3420178802.

The spelling of 1380312 in words is "one million, three hundred eighty thousand, three hundred twelve".