11561007 has 4 divisors (see below), whose sum is σ = 15414680. Its totient is φ = 7707336.

The previous prime is 11560981. The next prime is 11561021. The reversal of 11561007 is 70016511.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 11561007 - 2¹² = 11556911 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 (11561027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1926832 + ... + 1926837.

It is an arithmetic number, because the mean of its divisors is an integer number (3853670).

Almost surely, 2^11561007 is an apocalyptic number.

11561007 is a deficient number, since it is larger than the sum of its proper divisors (3853673).

11561007 is an equidigital number, since it uses as much as digits as its factorization.

11561007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3853672.

The product of its (nonzero) digits is 210, while the sum is 21.

The square root of 11561007 is about 3400.1480850104. The cubic root of 11561007 is about 226.1163092030.

Adding to 11561007 its reverse (70016511), we get a palindrome (81577518).

The spelling of 11561007 in words is "eleven million, five hundred sixty-one thousand, seven".