11561957 has 8 divisors (see below), whose sum is σ = 12730080. Its totient is φ = 10413360.

The previous prime is 11561917. The next prime is 11561971. The reversal of 11561957 is 75916511.

It is a happy number.

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 11561957 - 2¹⁰ = 11560933 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11561917) 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 in 7 ways as a sum of consecutive naturals, for example, 3623 + ... + 6020.

It is an arithmetic number, because the mean of its divisors is an integer number (1591260).

Almost surely, 2^11561957 is an apocalyptic number.

It is an amenable number.

11561957 is a deficient number, since it is larger than the sum of its proper divisors (1168123).

11561957 is a wasteful number, since it uses less digits than its factorization.

11561957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9763.

The product of its digits is 9450, while the sum is 35.

The square root of 11561957 is about 3400.2877819385. The cubic root of 11561957 is about 226.1225025681.

It can be divided in two parts, 1156 and 1957, that added together give a palindrome (3113).

The spelling of 11561957 in words is "eleven million, five hundred sixty-one thousand, nine hundred fifty-seven".