11772421 has 8 divisors (see below), whose sum is σ = 11934104. Its totient is φ = 11612160.

The previous prime is 11772407. The next prime is 11772427. The reversal of 11772421 is 12427711.

It can be written as a sum of positive squares in 4 ways, for example, as 476100 + 11296321 = 690^2 + 3361^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 11772421 - 2¹¹ = 11770373 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11772427) 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, 34765 + ... + 35101.

It is an arithmetic number, because the mean of its divisors is an integer number (1491763).

Almost surely, 2^11772421 is an apocalyptic number.

It is an amenable number.

11772421 is a deficient number, since it is larger than the sum of its proper divisors (161683).

11772421 is a wasteful number, since it uses less digits than its factorization.

11772421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 711.

The product of its digits is 784, while the sum is 25.

The square root of 11772421 is about 3431.0961805231. The cubic root of 11772421 is about 227.4863075928.

The spelling of 11772421 in words is "eleven million, seven hundred seventy-two thousand, four hundred twenty-one".