1235242140 has 96 divisors (see below), whose sum is σ = 3937199616. Its totient is φ = 286429440.

The previous prime is 1235242139. The next prime is 1235242147. The reversal of 1235242140 is 412425321.

It is a self number, because there is not a number n which added to its sum of digits gives 1235242140.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1235242147) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 25507 + ... + 55866.

It is an arithmetic number, because the mean of its divisors is an integer number (41012496).

Almost surely, 2^1235242140 is an apocalyptic number.

1235242140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1235242140 is an abundant number, since it is smaller than the sum of its proper divisors (2701957476).

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

1235242140 is a wasteful number, since it uses less digits than its factorization.

1235242140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81419 (or 81417 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 1235242140 is about 35146.0117225269. The cubic root of 1235242140 is about 1072.9612384655.

Adding to 1235242140 its reverse (412425321), we get a palindrome (1647667461).

The spelling of 1235242140 in words is "one billion, two hundred thirty-five million, two hundred forty-two thousand, one hundred forty".