11997406 has 4 divisors (see below), whose sum is σ = 17996112. Its totient is φ = 5998702.

The previous prime is 11997397. The next prime is 11997409. The reversal of 11997406 is 60479911.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11997409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2999350 + ... + 2999353.

It is an arithmetic number, because the mean of its divisors is an integer number (4499028).

Almost surely, 2^11997406 is an apocalyptic number.

11997406 is a deficient number, since it is larger than the sum of its proper divisors (5998706).

11997406 is an equidigital number, since it uses as much as digits as its factorization.

11997406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5998705.

The product of its (nonzero) digits is 13608, while the sum is 37.

The square root of 11997406 is about 3463.7271832522. The cubic root of 11997406 is about 228.9263507177.

It can be divided in two parts, 11997 and 406, that added together give a triangular number (12403 = T₁₅₇).

The spelling of 11997406 in words is "eleven million, nine hundred ninety-seven thousand, four hundred six".