261542300 has 36 divisors (see below), whose sum is σ = 587123880. Its totient is φ = 101008320.

The previous prime is 261542293. The next prime is 261542311. The reversal of 261542300 is 3245162.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 42194 + ... + 47993.

Almost surely, 2^261542300 is an apocalyptic number.

261542300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

261542300 is an abundant number, since it is smaller than the sum of its proper divisors (325581580).

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

261542300 is a wasteful number, since it uses less digits than its factorization.

261542300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90230 (or 90223 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 261542300 is about 16172.2694758652. The cubic root of 261542300 is about 639.5099601650.

Adding to 261542300 its reverse (3245162), we get a palindrome (264787462).

The spelling of 261542300 in words is "two hundred sixty-one million, five hundred forty-two thousand, three hundred".