10261665 has 24 divisors (see below), whose sum is σ = 17908800. Its totient is φ = 5435424.

The previous prime is 10261663. The next prime is 10261673. The reversal of 10261665 is 56616201.

It is a happy number.

It is not a de Polignac number, because 10261665 - 2¹ = 10261663 is a prime.

It is not an unprimeable number, because it can be changed into a prime (10261661) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6636 + ... + 8034.

It is an arithmetic number, because the mean of its divisors is an integer number (746200).

Almost surely, 2^10261665 is an apocalyptic number.

10261665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

10261665 is a deficient number, since it is larger than the sum of its proper divisors (7647135).

10261665 is a wasteful number, since it uses less digits than its factorization.

10261665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1573 (or 1570 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 10261665 is about 3203.3833676287. The cubic root of 10261665 is about 217.3064469126.

Adding to 10261665 its reverse (56616201), we get a palindrome (66877866).

The spelling of 10261665 in words is "ten million, two hundred sixty-one thousand, six hundred sixty-five".