261219242 has 16 divisors (see below), whose sum is σ = 395204832. Its totient is φ = 129489360.

The previous prime is 261219197. The next prime is 261219247. The reversal of 261219242 is 242912162.

It is not an unprimeable number, because it can be changed into a prime (261219247) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 129413 + ... + 131415.

It is an arithmetic number, because the mean of its divisors is an integer number (24700302).

Almost surely, 2^261219242 is an apocalyptic number.

261219242 is a deficient number, since it is larger than the sum of its proper divisors (133985590).

261219242 is a wasteful number, since it uses less digits than its factorization.

261219242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2533.

The product of its digits is 3456, while the sum is 29.

The square root of 261219242 is about 16162.2783666165. The cubic root of 261219242 is about 639.2465433346.

The spelling of 261219242 in words is "two hundred sixty-one million, two hundred nineteen thousand, two hundred forty-two".