361566421 has 4 divisors (see below), whose sum is σ = 382835052. Its totient is φ = 340297792.

The previous prime is 361566391. The next prime is 361566451. The reversal of 361566421 is 124665163.

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

It is an interprime number because it is at equal distance from previous prime (361566391) and next prime (361566451).

It can be written as a sum of positive squares in 2 ways, for example, as 278556100 + 83010321 = 16690^2 + 9111^2 .

It is a cyclic number.

It is not a de Polignac number, because 361566421 - 2²⁵ = 328011989 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 (361566451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10634290 + ... + 10634323.

It is an arithmetic number, because the mean of its divisors is an integer number (95708763).

Almost surely, 2^361566421 is an apocalyptic number.

It is an amenable number.

361566421 is a deficient number, since it is larger than the sum of its proper divisors (21268631).

361566421 is a wasteful number, since it uses less digits than its factorization.

361566421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21268630.

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

The square root of 361566421 is about 19014.8999734419. The cubic root of 361566421 is about 712.4089443913.

The spelling of 361566421 in words is "three hundred sixty-one million, five hundred sixty-six thousand, four hundred twenty-one".