361642421 has 4 divisors (see below), whose sum is σ = 413305632. Its totient is φ = 309979212.

The previous prime is 361642417. The next prime is 361642429. The reversal of 361642421 is 124246163.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 124246163 = 167 ⋅743989.

It is a cyclic number.

It is not a de Polignac number, because 361642421 - 2² = 361642417 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 (361642429) 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, 25831595 + ... + 25831608.

It is an arithmetic number, because the mean of its divisors is an integer number (103326408).

Almost surely, 2^361642421 is an apocalyptic number.

It is an amenable number.

361642421 is a deficient number, since it is larger than the sum of its proper divisors (51663211).

361642421 is an equidigital number, since it uses as much as digits as its factorization.

361642421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51663210.

The product of its digits is 6912, while the sum is 29.

The square root of 361642421 is about 19016.8983012478. The cubic root of 361642421 is about 712.4588561858.

Adding to 361642421 its reverse (124246163), we get a palindrome (485888584).

The spelling of 361642421 in words is "three hundred sixty-one million, six hundred forty-two thousand, four hundred twenty-one".