361051261 has 4 divisors (see below), whose sum is σ = 361375612. Its totient is φ = 360726912.

The previous prime is 361051241. The next prime is 361051283. The reversal of 361051261 is 162150163.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 134699236 + 226352025 = 11606^2 + 15045^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-361051261 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (361051241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 160500 + ... + 162733.

It is an arithmetic number, because the mean of its divisors is an integer number (90343903).

Almost surely, 2^361051261 is an apocalyptic number.

It is an amenable number.

361051261 is a deficient number, since it is larger than the sum of its proper divisors (324351).

361051261 is a wasteful number, since it uses less digits than its factorization.

361051261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 324350.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 361051261 is about 19001.3489258000. The cubic root of 361051261 is about 712.0704367098.

The spelling of 361051261 in words is "three hundred sixty-one million, fifty-one thousand, two hundred sixty-one".