1213963 has 8 divisors (see below), whose sum is σ = 1294848. Its totient is φ = 1135464.

The previous prime is 1213951. The next prime is 1213981. The reversal of 1213963 is 3693121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1213963 - 2⁵ = 1213931 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1213913) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 520 + ... + 1642.

It is an arithmetic number, because the mean of its divisors is an integer number (161856).

2^1213963 is an apocalyptic number.

1213963 is a deficient number, since it is larger than the sum of its proper divisors (80885).

1213963 is a wasteful number, since it uses less digits than its factorization.

1213963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1193.

The product of its digits is 972, while the sum is 25.

The square root of 1213963 is about 1101.7998910873. The cubic root of 1213963 is about 106.6764324826.

The spelling of 1213963 in words is "one million, two hundred thirteen thousand, nine hundred sixty-three".