354052421 has 4 divisors (see below), whose sum is σ = 374879052. Its totient is φ = 333225792.

The previous prime is 354052397. The next prime is 354052423. The reversal of 354052421 is 124250453.

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: 124250453 = 73 ⋅1702061.

It can be written as a sum of positive squares in 2 ways, for example, as 207763396 + 146289025 = 14414^2 + 12095^2 .

It is a cyclic number.

It is not a de Polignac number, because 354052421 - 2¹⁸ = 353790277 is a prime.

It is a super-2 number, since 2×354052421² = 250706233631922482, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (354052423) 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, 10413290 + ... + 10413323.

It is an arithmetic number, because the mean of its divisors is an integer number (93719763).

Almost surely, 2^354052421 is an apocalyptic number.

It is an amenable number.

354052421 is a deficient number, since it is larger than the sum of its proper divisors (20826631).

354052421 is a wasteful number, since it uses less digits than its factorization.

354052421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20826630.

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 354052421 is about 18816.2807430161. The cubic root of 354052421 is about 707.4393117210.

The spelling of 354052421 in words is "three hundred fifty-four million, fifty-two thousand, four hundred twenty-one".