10991425 has 12 divisors (see below), whose sum is σ = 13731760. Its totient is φ = 8727120.

The previous prime is 10991423. The next prime is 10991429. The reversal of 10991425 is 52419901.

10991425 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 10991425 - 2¹ = 10991423 is a prime.

It is a super-2 number, since 2×10991425² = 241622847061250, which contains 22 as substring.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (10991423) 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 11 ways as a sum of consecutive naturals, for example, 1894 + ... + 5056.

Almost surely, 2^10991425 is an apocalyptic number.

It is an amenable number.

10991425 is a deficient number, since it is larger than the sum of its proper divisors (2740335).

10991425 is a wasteful number, since it uses less digits than its factorization.

10991425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3312 (or 3307 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 31.

The square root of 10991425 is about 3315.3318084318. The cubic root of 10991425 is about 222.3402042481.

The spelling of 10991425 in words is "ten million, nine hundred ninety-one thousand, four hundred twenty-five".