261042300 has 54 divisors (see below), whose sum is σ = 818225408. Its totient is φ = 69611040.

The previous prime is 261042281. The next prime is 261042377. The reversal of 261042300 is 3240162.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a zygodrome in base 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 144124 + ... + 145923.

Almost surely, 2^261042300 is an apocalyptic number.

261042300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

261042300 is an abundant number, since it is smaller than the sum of its proper divisors (557183108).

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

261042300 is a wasteful number, since it uses less digits than its factorization.

261042300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290067 (or 290057 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 261042300 is about 16156.8035204987. The cubic root of 261042300 is about 639.1021753195.

Adding to 261042300 its reverse (3240162), we get a palindrome (264282462).

The spelling of 261042300 in words is "two hundred sixty-one million, forty-two thousand, three hundred".