205421412 has 48 divisors (see below), whose sum is σ = 550029312. Its totient is φ = 58452000.

The previous prime is 205421401. The next prime is 205421423. The reversal of 205421412 is 214124502.

It is an interprime number because it is at equal distance from previous prime (205421401) and next prime (205421423).

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16213 + ... + 25955.

It is an arithmetic number, because the mean of its divisors is an integer number (11458944).

Almost surely, 2^205421412 is an apocalyptic number.

It is an amenable number.

205421412 is an abundant number, since it is smaller than the sum of its proper divisors (344607900).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

205421412 is a wasteful number, since it uses less digits than its factorization.

205421412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10008 (or 10006 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 205421412 is about 14332.5298534488. The cubic root of 205421412 is about 590.0406100554.

Adding to 205421412 its reverse (214124502), we get a palindrome (419545914).

The spelling of 205421412 in words is "two hundred five million, four hundred twenty-one thousand, four hundred twelve".