11798551 has 4 divisors (see below), whose sum is σ = 12049632. Its totient is φ = 11547472.

The previous prime is 11798543. The next prime is 11798557. The reversal of 11798551 is 15589711.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15589711 = 181 ⋅86131.

It is a cyclic number.

It is not a de Polignac number, because 11798551 - 2³ = 11798543 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11798551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11798557) 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, 125470 + ... + 125563.

It is an arithmetic number, because the mean of its divisors is an integer number (3012408).

Almost surely, 2^11798551 is an apocalyptic number.

11798551 is a deficient number, since it is larger than the sum of its proper divisors (251081).

11798551 is an equidigital number, since it uses as much as digits as its factorization.

11798551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251080.

The product of its digits is 12600, while the sum is 37.

The square root of 11798551 is about 3434.9018908842. The cubic root of 11798551 is about 227.6544923333.

It can be divided in two parts, 1179 and 8551, that added together give a triangular number (9730 = T₁₃₉).

The spelling of 11798551 in words is "eleven million, seven hundred ninety-eight thousand, five hundred fifty-one".