261026103 has 16 divisors (see below), whose sum is σ = 391104000. Its totient is φ = 153646944.

The previous prime is 261026093. The next prime is 261026153. The reversal of 261026103 is 301620162.

It is a happy number.

It is not a de Polignac number, because 261026103 - 2⁸ = 261025847 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 261026103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261026153) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 144603 + ... + 146396.

It is an arithmetic number, because the mean of its divisors is an integer number (24444000).

Almost surely, 2^261026103 is an apocalyptic number.

261026103 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

261026103 is a deficient number, since it is larger than the sum of its proper divisors (130077897).

261026103 is a wasteful number, since it uses less digits than its factorization.

261026103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 291038.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 261026103 is about 16156.3022687743. The cubic root of 261026103 is about 639.0889568334.

Adding to 261026103 its reverse (301620162), we get a palindrome (562646265).

The spelling of 261026103 in words is "two hundred sixty-one million, twenty-six thousand, one hundred three".