1213908 has 12 divisors (see below), whose sum is σ = 2832480. Its totient is φ = 404632.

The previous prime is 1213907. The next prime is 1213909. The reversal of 1213908 is 8093121.

It is an interprime number because it is at equal distance from previous prime (1213907) and next prime (1213909).

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

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213907) 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, 50568 + ... + 50591.

It is an arithmetic number, because the mean of its divisors is an integer number (236040).

2^1213908 is an apocalyptic number.

It is an amenable number.

1213908 is an abundant number, since it is smaller than the sum of its proper divisors (1618572).

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

1213908 is a wasteful number, since it uses less digits than its factorization.

1213908 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101166 (or 101164 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 24.

The square root of 1213908 is about 1101.7749316444. The cubic root of 1213908 is about 106.6748214252.

The spelling of 1213908 in words is "one million, two hundred thirteen thousand, nine hundred eight".