10258991 has 4 divisors (see below), whose sum is σ = 10282800. Its totient is φ = 10235184.

The previous prime is 10258987. The next prime is 10259009. The reversal of 10258991 is 19985201.

10258991 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19985201 = 97 ⋅206033.

It is a cyclic number.

It is not a de Polignac number, because 10258991 - 2² = 10258987 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 (10258901) 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, 11246 + ... + 12123.

It is an arithmetic number, because the mean of its divisors is an integer number (2570700).

Almost surely, 2^10258991 is an apocalyptic number.

10258991 is a deficient number, since it is larger than the sum of its proper divisors (23809).

10258991 is an equidigital number, since it uses as much as digits as its factorization.

10258991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23808.

The product of its (nonzero) digits is 6480, while the sum is 35.

The square root of 10258991 is about 3202.9659692229. The cubic root of 10258991 is about 217.2875699266.

The spelling of 10258991 in words is "ten million, two hundred fifty-eight thousand, nine hundred ninety-one".