340563021 has 8 divisors (see below), whose sum is σ = 454792800. Its totient is φ = 226687632.

The previous prime is 340563007. The next prime is 340563029. The reversal of 340563021 is 120365043.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 340563021 - 2¹⁰ = 340561997 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 340562982 and 340563000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (340563029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 86346 + ... + 90203.

It is an arithmetic number, because the mean of its divisors is an integer number (56849100).

Almost surely, 2^340563021 is an apocalyptic number.

It is an amenable number.

340563021 is a deficient number, since it is larger than the sum of its proper divisors (114229779).

340563021 is a wasteful number, since it uses less digits than its factorization.

340563021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177195.

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 340563021 is about 18454.3496498793. The cubic root of 340563021 is about 698.3382493994.

The spelling of 340563021 in words is "three hundred forty million, five hundred sixty-three thousand, twenty-one".