261040450 has 24 divisors (see below), whose sum is σ = 529675920. Its totient is φ = 94923600.

The previous prime is 261040447. The next prime is 261040453. The reversal of 261040450 is 54040162.

261040450 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (261040447) and next prime (261040453).

It is a Harshad number since it is a multiple of its sum of digits (22).

It is not an unprimeable number, because it can be changed into a prime (261040453) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 236760 + ... + 237859.

It is an arithmetic number, because the mean of its divisors is an integer number (22069830).

Almost surely, 2^261040450 is an apocalyptic number.

261040450 is an abundant number, since it is smaller than the sum of its proper divisors (268635470).

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

261040450 is a wasteful number, since it uses less digits than its factorization.

261040450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 474642 (or 474637 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 261040450 is about 16156.7462689738. The cubic root of 261040450 is about 639.1006655490.

The spelling of 261040450 in words is "two hundred sixty-one million, forty thousand, four hundred fifty".