261103700 has 216 divisors, whose sum is σ = 724016160. Its totient is φ = 80352000.

The previous prime is 261103691. The next prime is 261103741. The reversal of 261103700 is 7301162.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 8422685 + ... + 8422715.

Almost surely, 2^261103700 is an apocalyptic number.

261103700 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 261103700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (362008080).

261103700 is an abundant number, since it is smaller than the sum of its proper divisors (462912460).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

261103700 is a wasteful number, since it uses less digits than its factorization.

261103700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119 (or 81 counting only the distinct ones).

The product of its (nonzero) digits is 252, while the sum is 20.

The square root of 261103700 is about 16158.7035371035. The cubic root of 261103700 is about 639.1522793286.

Adding to 261103700 its reverse (7301162), we get a palindrome (268404862).

The spelling of 261103700 in words is "two hundred sixty-one million, one hundred three thousand, seven hundred".