361654121 has 4 divisors (see below), whose sum is σ = 365382612. Its totient is φ = 357925632.

The previous prime is 361654063. The next prime is 361654159. The reversal of 361654121 is 121456163.

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: 121456163 = 37 ⋅3282599.

It can be written as a sum of positive squares in 2 ways, for example, as 140090896 + 221563225 = 11836^2 + 14885^2 .

It is a cyclic number.

It is not a de Polignac number, because 361654121 - 2⁶ = 361654057 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (361624121) 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, 1864100 + ... + 1864293.

It is an arithmetic number, because the mean of its divisors is an integer number (91345653).

Almost surely, 2^361654121 is an apocalyptic number.

It is an amenable number.

361654121 is a deficient number, since it is larger than the sum of its proper divisors (3728491).

361654121 is an equidigital number, since it uses as much as digits as its factorization.

361654121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3728490.

The product of its digits is 4320, while the sum is 29.

The square root of 361654121 is about 19017.2059199032. The cubic root of 361654121 is about 712.4665393540.

The spelling of 361654121 in words is "three hundred sixty-one million, six hundred fifty-four thousand, one hundred twenty-one".