253400042 has 8 divisors (see below), whose sum is σ = 434400096. Its totient is φ = 108600012.

The previous prime is 253400023. The next prime is 253400047. The reversal of 253400042 is 240004352.

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

It is a junction number, because it is equal to n+sod(n) for n = 253399987 and 253400023.

It is not an unprimeable number, because it can be changed into a prime (253400047) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9049988 + ... + 9050015.

It is an arithmetic number, because the mean of its divisors is an integer number (54300012).

Almost surely, 2^253400042 is an apocalyptic number.

253400042 is a deficient number, since it is larger than the sum of its proper divisors (181000054).

253400042 is a wasteful number, since it uses less digits than its factorization.

253400042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18100012.

The product of its (nonzero) digits is 960, while the sum is 20.

The square root of 253400042 is about 15918.5439660793. The cubic root of 253400042 is about 632.8035315057.

Adding to 253400042 its reverse (240004352), we get a palindrome (493404394).

The spelling of 253400042 in words is "two hundred fifty-three million, four hundred thousand, forty-two".