1242634556 has 12 divisors (see below), whose sum is σ = 2174901120. Its totient is φ = 621234240.

The previous prime is 1242634537. The next prime is 1242634559. The reversal of 1242634556 is 6554362421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242634559) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23300 + ... + 55028.

It is an arithmetic number, because the mean of its divisors is an integer number (181241760).

Almost surely, 2^1242634556 is an apocalyptic number.

It is an amenable number.

1242634556 is a deficient number, since it is larger than the sum of its proper divisors (932266564).

1242634556 is a wasteful number, since it uses less digits than its factorization.

1242634556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41524 (or 41522 counting only the distinct ones).

The product of its digits is 172800, while the sum is 38.

The square root of 1242634556 is about 35251.0220561050. The cubic root of 1242634556 is about 1075.0973933033.

Adding to 1242634556 its reverse (6554362421), we get a palindrome (7796996977).

The spelling of 1242634556 in words is "one billion, two hundred forty-two million, six hundred thirty-four thousand, five hundred fifty-six".