1240142040 has 96 divisors (see below), whose sum is σ = 4043548080. Its totient is φ = 329630976.

The previous prime is 1240142039. The next prime is 1240142053. The reversal of 1240142040 is 402410421.

1240142040 is a `hidden beast` number, since 1 + 240 + 1 + 420 + 4 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 108687 + ... + 119553.

Almost surely, 2^1240142040 is an apocalyptic number.

1240142040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1240142040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2021774040).

1240142040 is an abundant number, since it is smaller than the sum of its proper divisors (2803406040).

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

1240142040 is a wasteful number, since it uses less digits than its factorization.

1240142040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11201 (or 11194 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 1240142040 is about 35215.6504980385. The cubic root of 1240142040 is about 1074.3780906157.

Adding to 1240142040 its reverse (402410421), we get a palindrome (1642552461).

The spelling of 1240142040 in words is "one billion, two hundred forty million, one hundred forty-two thousand, forty".