10506391 has 8 divisors (see below), whose sum is σ = 12713760. Its totient is φ = 8475648.

The previous prime is 10506383. The next prime is 10506407. The reversal of 10506391 is 19360501.

10506391 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 10506391 - 2³ = 10506383 is a prime.

It is a super-2 number, since 2×10506391² = 220768503689762, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10506311) 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, 44026 + ... + 44263.

It is an arithmetic number, because the mean of its divisors is an integer number (1589220).

Almost surely, 2^10506391 is an apocalyptic number.

10506391 is a deficient number, since it is larger than the sum of its proper divisors (2207369).

10506391 is an equidigital number, since it uses as much as digits as its factorization.

10506391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88313.

The product of its (nonzero) digits is 810, while the sum is 25.

The square root of 10506391 is about 3241.3563518996. The cubic root of 10506391 is about 219.0203757721.

Adding to 10506391 its reverse (19360501), we get a palindrome (29866892).

The spelling of 10506391 in words is "ten million, five hundred six thousand, three hundred ninety-one".