352340421 has 4 divisors (see below), whose sum is σ = 469787232. Its totient is φ = 234893612.

The previous prime is 352340383. The next prime is 352340423. The reversal of 352340421 is 124043253.

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: 124043253 = 3 ⋅41347751.

It is a cyclic number.

It is not a de Polignac number, because 352340421 - 2¹⁸ = 352078277 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 352340391 and 352340400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (352340423) 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, 58723401 + ... + 58723406.

It is an arithmetic number, because the mean of its divisors is an integer number (117446808).

Almost surely, 2^352340421 is an apocalyptic number.

It is an amenable number.

352340421 is a deficient number, since it is larger than the sum of its proper divisors (117446811).

352340421 is a wasteful number, since it uses less digits than its factorization.

352340421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117446810.

The product of its (nonzero) digits is 2880, while the sum is 24.

The square root of 352340421 is about 18770.7330970317. The cubic root of 352340421 is about 706.2972082574.

Adding to 352340421 its reverse (124043253), we get a palindrome (476383674).

The spelling of 352340421 in words is "three hundred fifty-two million, three hundred forty thousand, four hundred twenty-one".