1281225990242 has 16 divisors (see below), whose sum is σ = 2153215179072. Its totient is φ = 566635572720.

The previous prime is 1281225990193. The next prime is 1281225990259. The reversal of 1281225990242 is 2420995221821.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 786993038 + ... + 786994665.

It is an arithmetic number, because the mean of its divisors is an integer number (134575948692).

Almost surely, 2^{1281225990242} is an apocalyptic number.

1281225990242 is a deficient number, since it is larger than the sum of its proper divisors (871989188830).

1281225990242 is a wasteful number, since it uses less digits than its factorization.

1281225990242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1573987753.

The product of its (nonzero) digits is 414720, while the sum is 47.

The spelling of 1281225990242 in words is "one trillion, two hundred eighty-one billion, two hundred twenty-five million, nine hundred ninety thousand, two hundred forty-two".