385542421 has 12 divisors (see below), whose sum is σ = 424403532. Its totient is φ = 349976000.

The previous prime is 385542407. The next prime is 385542463. The reversal of 385542421 is 124245583.

It can be written as a sum of positive squares in 2 ways, for example, as 172791025 + 212751396 = 13145^2 + 14586^2 .

It is not a de Polignac number, because 385542421 - 2⁵ = 385542389 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 (385542481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 97401 + ... + 101281.

It is an arithmetic number, because the mean of its divisors is an integer number (35366961).

Almost surely, 2^385542421 is an apocalyptic number.

It is an amenable number.

385542421 is a deficient number, since it is larger than the sum of its proper divisors (38861111).

385542421 is a wasteful number, since it uses less digits than its factorization.

385542421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4724 (or 4713 counting only the distinct ones).

The product of its digits is 38400, while the sum is 34.

The square root of 385542421 is about 19635.2341722731. The cubic root of 385542421 is about 727.8201193105.

The spelling of 385542421 in words is "three hundred eighty-five million, five hundred forty-two thousand, four hundred twenty-one".