205421126 has 8 divisors (see below), whose sum is σ = 313354440. Its totient is φ = 100969648.

The previous prime is 205421107. The next prime is 205421131. The reversal of 205421126 is 621124502.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 870311 + ... + 870546.

It is an arithmetic number, because the mean of its divisors is an integer number (39169305).

Almost surely, 2^205421126 is an apocalyptic number.

205421126 is a deficient number, since it is larger than the sum of its proper divisors (107933314).

205421126 is a wasteful number, since it uses less digits than its factorization.

205421126 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1740918.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 205421126 is about 14332.5198761418. The cubic root of 205421126 is about 590.0403362253.

Adding to 205421126 its reverse (621124502), we get a palindrome (826545628).

The spelling of 205421126 in words is "two hundred five million, four hundred twenty-one thousand, one hundred twenty-six".