205142456 has 8 divisors (see below), whose sum is σ = 384642120. Its totient is φ = 102571224.

The previous prime is 205142453. The next prime is 205142459. The reversal of 205142456 is 654241502.

205142456 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (205142453) and next prime (205142459).

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205142453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12821396 + ... + 12821411.

It is an arithmetic number, because the mean of its divisors is an integer number (48080265).

Almost surely, 2^205142456 is an apocalyptic number.

It is an amenable number.

205142456 is a deficient number, since it is larger than the sum of its proper divisors (179499664).

205142456 is a wasteful number, since it uses less digits than its factorization.

205142456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25642813 (or 25642809 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 29.

The square root of 205142456 is about 14322.7949786346. The cubic root of 205142456 is about 589.7734033603.

Adding to 205142456 its reverse (654241502), we get a palindrome (859383958).

The spelling of 205142456 in words is "two hundred five million, one hundred forty-two thousand, four hundred fifty-six".