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381012 = 22331751

381012 has 12 divisors (see below), whose sum is σ = 889056. Its totient is φ = 127000.

The previous prime is 381011. The next prime is 381019. The reversal of 381012 is 210183.

Adding to 381012 its reverse (210183), we get a palindrome (591195).

It is a happy number.

381012 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is an Ulam number.

It is an alternating number because its digits alternate between odd and even.

It is a junction number, because it is equal to n+sod(n) for n = 380982 and 381000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15864 + ... + 15887.

It is an arithmetic number, because the mean of its divisors is an integer number (74088).

2381012 is an apocalyptic number.

It is an amenable number.

381012 is an abundant number, since it is smaller than the sum of its proper divisors (508044).

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

381012 is a wasteful number, since it uses less digits than its factorization.

381012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31758 (or 31756 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 381012 is about 617.2616949074. The cubic root of 381012 is about 72.4958063369.

The spelling of 381012 in words is "three hundred eighty-one thousand, twelve".

Divisors: 1 2 3 4 6 12 31751 63502 95253 127004 190506 381012