1240231542 has 48 divisors (see below), whose sum is σ = 2770625088. Its totient is φ = 367051440.

The previous prime is 1240231541. The next prime is 1240231579. The reversal of 1240231542 is 2451320421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1240231541) 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, 116953 + ... + 127115.

It is an arithmetic number, because the mean of its divisors is an integer number (57721356).

Almost surely, 2^1240231542 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1240231542, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1385312544).

1240231542 is an abundant number, since it is smaller than the sum of its proper divisors (1530393546).

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

1240231542 is a wasteful number, since it uses less digits than its factorization.

1240231542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10265 (or 10222 counting only the distinct ones).

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

The square root of 1240231542 is about 35216.9212453332. The cubic root of 1240231542 is about 1074.4039362235.

Adding to 1240231542 its reverse (2451320421), we get a palindrome (3691551963).

The spelling of 1240231542 in words is "one billion, two hundred forty million, two hundred thirty-one thousand, five hundred forty-two".