261125802 has 192 divisors, whose sum is σ = 723945600. Its totient is φ = 69431040.

The previous prime is 261125789. The next prime is 261125807. The reversal of 261125802 is 208521162.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (261125807) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 3146053 + ... + 3146135.

It is an arithmetic number, because the mean of its divisors is an integer number (3770550).

Almost surely, 2^261125802 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 261125802, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (361972800).

261125802 is an abundant number, since it is smaller than the sum of its proper divisors (462819798).

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

261125802 is a wasteful number, since it uses less digits than its factorization.

261125802 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178 (or 165 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 261125802 is about 16159.3874265085. The cubic root of 261125802 is about 639.1703132172.

Adding to 261125802 its reverse (208521162), we get a palindrome (469646964).

The spelling of 261125802 in words is "two hundred sixty-one million, one hundred twenty-five thousand, eight hundred two".