1240542 has 16 divisors (see below), whose sum is σ = 2756880. Its totient is φ = 413496.

The previous prime is 1240523. The next prime is 1240543. The reversal of 1240542 is 2450421.

1240542 is a `hidden beast` number, since 124 + 0 + 542 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1240543) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11433 + ... + 11540.

It is an arithmetic number, because the mean of its divisors is an integer number (172305).

2^1240542 is an apocalyptic number.

1240542 is an abundant number, since it is smaller than the sum of its proper divisors (1516338).

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

1240542 is a wasteful number, since it uses less digits than its factorization.

1240542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22984 (or 22978 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 1240542 is about 1113.7962111625. The cubic root of 1240542 is about 107.4493577944.

Adding to 1240542 its reverse (2450421), we get a palindrome (3690963).

The spelling of 1240542 in words is "one million, two hundred forty thousand, five hundred forty-two".