142435640 has 32 divisors (see below), whose sum is σ = 328300560. Its totient is φ = 55584000.

The previous prime is 142435633. The next prime is 142435661. The reversal of 142435640 is 46534241.

142435640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41786 + ... + 45065.

Almost surely, 2^142435640 is an apocalyptic number.

142435640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

142435640 is an abundant number, since it is smaller than the sum of its proper divisors (185864920).

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

142435640 is a wasteful number, since it uses less digits than its factorization.

142435640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86903 (or 86899 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 29.

The square root of 142435640 is about 11934.6403381082. The cubic root of 142435640 is about 522.2433161508.

Adding to 142435640 its reverse (46534241), we get a palindrome (188969881).

The spelling of 142435640 in words is "one hundred forty-two million, four hundred thirty-five thousand, six hundred forty".