261246450 has 48 divisors (see below), whose sum is σ = 651833280. Its totient is φ = 69241920.

The previous prime is 261246449. The next prime is 261246451. The reversal of 261246450 is 54642162.

It is an interprime number because it is at equal distance from previous prime (261246449) and next prime (261246451).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (261246451) 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, 19836 + ... + 30264.

It is an arithmetic number, because the mean of its divisors is an integer number (13579860).

Almost surely, 2^261246450 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 261246450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (325916640).

261246450 is an abundant number, since it is smaller than the sum of its proper divisors (390586830).

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

261246450 is a wasteful number, since it uses less digits than its factorization.

261246450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10611 (or 10606 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 30.

The square root of 261246450 is about 16163.1200577116. The cubic root of 261246450 is about 639.2687367177.

The spelling of 261246450 in words is "two hundred sixty-one million, two hundred forty-six thousand, four hundred fifty".