361860421 has 4 divisors (see below), whose sum is σ = 389695852. Its totient is φ = 334024992.

The previous prime is 361860413. The next prime is 361860439. The reversal of 361860421 is 124068163.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 124068163 = 311 ⋅398933.

It can be written as a sum of positive squares in 2 ways, for example, as 75777025 + 286083396 = 8705^2 + 16914^2 .

It is a cyclic number.

It is not a de Polignac number, because 361860421 - 2³ = 361860413 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (361860451) 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, 13917696 + ... + 13917721.

It is an arithmetic number, because the mean of its divisors is an integer number (97423963).

Almost surely, 2^361860421 is an apocalyptic number.

It is an amenable number.

361860421 is a deficient number, since it is larger than the sum of its proper divisors (27835431).

361860421 is a wasteful number, since it uses less digits than its factorization.

361860421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27835430.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 361860421 is about 19022.6291821083. The cubic root of 361860421 is about 712.6019854424.

The spelling of 361860421 in words is "three hundred sixty-one million, eight hundred sixty thousand, four hundred twenty-one".