1290747542 has 32 divisors (see below), whose sum is σ = 2351695680. Its totient is φ = 518676480.

The previous prime is 1290747541. The next prime is 1290747571. The reversal of 1290747542 is 2457470921.

It is a self number, because there is not a number n which added to its sum of digits gives 1290747542.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1290747541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53942 + ... + 74102.

It is an arithmetic number, because the mean of its divisors is an integer number (73490490).

Almost surely, 2^1290747542 is an apocalyptic number.

1290747542 is a deficient number, since it is larger than the sum of its proper divisors (1060948138).

1290747542 is a wasteful number, since it uses less digits than its factorization.

1290747542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20456.

The product of its (nonzero) digits is 141120, while the sum is 41.

The square root of 1290747542 is about 35926.9751301164. The cubic root of 1290747542 is about 1088.7974679591.

The spelling of 1290747542 in words is "one billion, two hundred ninety million, seven hundred forty-seven thousand, five hundred forty-two".