361426561 has 2 divisors, whose sum is σ = 361426562. Its totient is φ = 361426560.

The previous prime is 361426547. The next prime is 361426589. The reversal of 361426561 is 165624163.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 245110336 + 116316225 = 15656^2 + 10785^2 .

It is a cyclic number.

It is not a de Polignac number, because 361426561 - 2⁷ = 361426433 is a prime.

It is not a weakly prime, because it can be changed into another prime (361426061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 180713280 + 180713281.

It is an arithmetic number, because the mean of its divisors is an integer number (180713281).

Almost surely, 2^361426561 is an apocalyptic number.

It is an amenable number.

361426561 is a deficient number, since it is larger than the sum of its proper divisors (1).

361426561 is an equidigital number, since it uses as much as digits as its factorization.

361426561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25920, while the sum is 34.

The square root of 361426561 is about 19011.2219754544. The cubic root of 361426561 is about 712.3170752731.

The spelling of 361426561 in words is "three hundred sixty-one million, four hundred twenty-six thousand, five hundred sixty-one".