1240772742 has 40 divisors (see below), whose sum is σ = 3033004392. Its totient is φ = 375991200.

The previous prime is 1240772723. The next prime is 1240772747. The reversal of 1240772742 is 2472770421.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1240772697 and 1240772706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1240772747) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 346359 + ... + 349922.

Almost surely, 2^1240772742 is an apocalyptic number.

1240772742 is an abundant number, since it is smaller than the sum of its proper divisors (1792231650).

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

1240772742 is a wasteful number, since it uses less digits than its factorization.

1240772742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 696306 (or 696297 counting only the distinct ones).

The product of its (nonzero) digits is 43904, while the sum is 36.

The square root of 1240772742 is about 35224.6042135323. The cubic root of 1240772742 is about 1074.5601927592.

The spelling of 1240772742 in words is "one billion, two hundred forty million, seven hundred seventy-two thousand, seven hundred forty-two".