11961549 has 6 divisors (see below), whose sum is σ = 17277806. Its totient is φ = 7974360.

The previous prime is 11961527. The next prime is 11961563. The reversal of 11961549 is 94516911.

11961549 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 11902500 + 59049 = 3450^2 + 243^2 .

It is not a de Polignac number, because 11961549 - 2¹² = 11957453 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11961569) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 664522 + ... + 664539.

Almost surely, 2^11961549 is an apocalyptic number.

It is an amenable number.

11961549 is a deficient number, since it is larger than the sum of its proper divisors (5316257).

11961549 is a wasteful number, since it uses less digits than its factorization.

11961549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1329067 (or 1329064 counting only the distinct ones).

The product of its digits is 9720, while the sum is 36.

The square root of 11961549 is about 3458.5472383647. The cubic root of 11961549 is about 228.6980568255.

The spelling of 11961549 in words is "eleven million, nine hundred sixty-one thousand, five hundred forty-nine".