261015142 has 16 divisors (see below), whose sum is σ = 401976432. Its totient is φ = 127060960.

The previous prime is 261015137. The next prime is 261015149. The reversal of 261015142 is 241510162.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261015149) 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, 4488 + ... + 23284.

It is an arithmetic number, because the mean of its divisors is an integer number (25123527).

Almost surely, 2^261015142 is an apocalyptic number.

261015142 is a deficient number, since it is larger than the sum of its proper divisors (140961290).

261015142 is a wasteful number, since it uses less digits than its factorization.

261015142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18983.

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 261015142 is about 16155.9630477418. The cubic root of 261015142 is about 639.0800111736.

The spelling of 261015142 in words is "two hundred sixty-one million, fifteen thousand, one hundred forty-two".