1213000646 has 16 divisors (see below), whose sum is σ = 2137596048. Its totient is φ = 508951200.

The previous prime is 1213000639. The next prime is 1213000651. The reversal of 1213000646 is 6460003121.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2120345 + ... + 2120916.

It is an arithmetic number, because the mean of its divisors is an integer number (133599753).

Almost surely, 2^1213000646 is an apocalyptic number.

1213000646 is a deficient number, since it is larger than the sum of its proper divisors (924595402).

1213000646 is a wasteful number, since it uses less digits than its factorization.

1213000646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4241287.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 1213000646 is about 34828.1588086422. The cubic root of 1213000646 is about 1066.4823622757.

Adding to 1213000646 its reverse (6460003121), we get a palindrome (7673003767).

The spelling of 1213000646 in words is "one billion, two hundred thirteen million, six hundred forty-six", and thus it is an aban number.