261250350 has 48 divisors (see below), whose sum is σ = 653676912. Its totient is φ = 69045760.

The previous prime is 261250349. The next prime is 261250351. The reversal of 261250350 is 53052162.

It is an interprime number because it is at equal distance from previous prime (261250349) and next prime (261250351).

It is a self number, because there is not a number n which added to its sum of digits gives 261250350.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261250351) 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, 9244 + ... + 24656.

It is an arithmetic number, because the mean of its divisors is an integer number (13618269).

Almost surely, 2^261250350 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 261250350, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (326838456).

261250350 is an abundant number, since it is smaller than the sum of its proper divisors (392426562).

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

261250350 is a wasteful number, since it uses less digits than its factorization.

261250350 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15541 (or 15536 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 261250350 is about 16163.2407022849. The cubic root of 261250350 is about 639.2719177953.

The spelling of 261250350 in words is "two hundred sixty-one million, two hundred fifty thousand, three hundred fifty".