11975540 has 12 divisors (see below), whose sum is σ = 25148676. Its totient is φ = 4790208.

The previous prime is 11975539. The next prime is 11975549. The reversal of 11975540 is 4557911.

It can be written as a sum of positive squares in 2 ways, for example, as 2951524 + 9024016 = 1718^2 + 3004^2 .

It is a junction number, because it is equal to n+sod(n) for n = 11975497 and 11975506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11975549) 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, 299369 + ... + 299408.

It is an arithmetic number, because the mean of its divisors is an integer number (2095723).

Almost surely, 2^11975540 is an apocalyptic number.

11975540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11975540 is an abundant number, since it is smaller than the sum of its proper divisors (13173136).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11975540 is a wasteful number, since it uses less digits than its factorization.

11975540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 598786 (or 598784 counting only the distinct ones).

The product of its (nonzero) digits is 6300, while the sum is 32.

The square root of 11975540 is about 3460.5693173234. The cubic root of 11975540 is about 228.7871887540.

The spelling of 11975540 in words is "eleven million, nine hundred seventy-five thousand, five hundred forty".