360140821 has 4 divisors (see below), whose sum is σ = 372559500. Its totient is φ = 347722144.

The previous prime is 360140813. The next prime is 360140827. The reversal of 360140821 is 128041063.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 128041063 = 2153 ⋅59471.

It can be written as a sum of positive squares in 2 ways, for example, as 115562500 + 244578321 = 10750^2 + 15639^2 .

It is a cyclic number.

It is not a de Polignac number, because 360140821 - 2³ = 360140813 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 (360140827) 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, 6209296 + ... + 6209353.

It is an arithmetic number, because the mean of its divisors is an integer number (93139875).

Almost surely, 2^360140821 is an apocalyptic number.

It is an amenable number.

360140821 is a deficient number, since it is larger than the sum of its proper divisors (12418679).

360140821 is a wasteful number, since it uses less digits than its factorization.

360140821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12418678.

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 360140821 is about 18977.3765573643. The cubic root of 360140821 is about 711.4714053380.

Adding to 360140821 its reverse (128041063), we get a palindrome (488181884).

The spelling of 360140821 in words is "three hundred sixty million, one hundred forty thousand, eight hundred twenty-one".