354264021 has 6 divisors (see below), whose sum is σ = 511714710. Its totient is φ = 236176008.

The previous prime is 354264019. The next prime is 354264047. The reversal of 354264021 is 120462453.

It can be written as a sum of positive squares in only one way, i.e., 286794225 + 67469796 = 16935^2 + 8214^2 .

It is not a de Polignac number, because 354264021 - 2¹ = 354264019 is a prime.

It is a super-3 number, since 3×354264021³ (a number of 27 digits) contains 333 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (354264821) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 19681326 + ... + 19681343.

It is an arithmetic number, because the mean of its divisors is an integer number (85285785).

Almost surely, 2^354264021 is an apocalyptic number.

It is an amenable number.

354264021 is a deficient number, since it is larger than the sum of its proper divisors (157450689).

354264021 is a wasteful number, since it uses less digits than its factorization.

354264021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39362675 (or 39362672 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 354264021 is about 18821.9026934048. The cubic root of 354264021 is about 707.5802177354.

The spelling of 354264021 in words is "three hundred fifty-four million, two hundred sixty-four thousand, twenty-one".