261130001 has 8 divisors (see below), whose sum is σ = 286317504. Its totient is φ = 236183920.

The previous prime is 261129983. The next prime is 261130039. The reversal of 261130001 is 100031162.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 261130001 - 2¹⁰ = 261128977 is a prime.

It is not an unprimeable number, because it can be changed into a prime (261130061) 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, 58085 + ... + 62418.

It is an arithmetic number, because the mean of its divisors is an integer number (35789688).

Almost surely, 2^261130001 is an apocalyptic number.

It is an amenable number.

261130001 is a deficient number, since it is larger than the sum of its proper divisors (25187503).

261130001 is a wasteful number, since it uses less digits than its factorization.

261130001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120711.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 261130001 is about 16159.5173504656. The cubic root of 261130001 is about 639.1737392309.

Adding to 261130001 its reverse (100031162), we get a palindrome (361161163).

The spelling of 261130001 in words is "two hundred sixty-one million, one hundred thirty thousand, one".