253740146 has 48 divisors (see below), whose sum is σ = 436665600. Its totient is φ = 110378400.

The previous prime is 253740143. The next prime is 253740161. The reversal of 253740146 is 641047352.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253740143) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1117685 + ... + 1117911.

It is an arithmetic number, because the mean of its divisors is an integer number (9097200).

Almost surely, 2^253740146 is an apocalyptic number.

253740146 is a deficient number, since it is larger than the sum of its proper divisors (182925454).

253740146 is a wasteful number, since it uses less digits than its factorization.

253740146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 431 (or 420 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 32.

The square root of 253740146 is about 15929.2230193440. The cubic root of 253740146 is about 633.0865133027.

Adding to 253740146 its reverse (641047352), we get a palindrome (894787498).

The spelling of 253740146 in words is "two hundred fifty-three million, seven hundred forty thousand, one hundred forty-six".