11980557 has 12 divisors (see below), whose sum is σ = 17500860. Its totient is φ = 7896768.

The previous prime is 11980547. The next prime is 11980559. The reversal of 11980557 is 75508911.

11980557 is a `hidden beast` number, since 11 + 98 + 0 + 557 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 2653641 + 9326916 = 1629^2 + 3054^2 .

It is not a de Polignac number, because 11980557 - 2⁸ = 11980301 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11980559) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6678 + ... + 8279.

It is an arithmetic number, because the mean of its divisors is an integer number (1458405).

Almost surely, 2^11980557 is an apocalyptic number.

It is an amenable number.

11980557 is a deficient number, since it is larger than the sum of its proper divisors (5520303).

11980557 is a wasteful number, since it uses less digits than its factorization.

11980557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15052 (or 15049 counting only the distinct ones).

The product of its (nonzero) digits is 12600, while the sum is 36.

The square root of 11980557 is about 3461.2941221456. The cubic root of 11980557 is about 228.8191334534.

The spelling of 11980557 in words is "eleven million, nine hundred eighty thousand, five hundred fifty-seven".