10787121 has 8 divisors (see below), whose sum is σ = 15980960. Its totient is φ = 7191396.

The previous prime is 10787099. The next prime is 10787123. The reversal of 10787121 is 12178701.

It is not a de Polignac number, because 10787121 - 2⁵ = 10787089 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 399523 = 10787121 / (1 + 0 + 7 + 8 + 7 + 1 + 2 + 1).

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (10787123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 199735 + ... + 199788.

It is an arithmetic number, because the mean of its divisors is an integer number (1997620).

Almost surely, 2^10787121 is an apocalyptic number.

It is an amenable number.

10787121 is a deficient number, since it is larger than the sum of its proper divisors (5193839).

10787121 is an equidigital number, since it uses as much as digits as its factorization.

10787121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 399532 (or 399526 counting only the distinct ones).

The product of its (nonzero) digits is 784, while the sum is 27.

The square root of 10787121 is about 3284.3752830637. The cubic root of 10787121 is about 220.9539908180.

The spelling of 10787121 in words is "ten million, seven hundred eighty-seven thousand, one hundred twenty-one".