1251433541002 has 16 divisors (see below), whose sum is σ = 1987922570760. Its totient is φ = 588805708288.

The previous prime is 1251433540957. The next prime is 1251433541077. The reversal of 1251433541002 is 2001453341521.

It can be written as a sum of positive squares in 4 ways, for example, as 748413581881 + 503019959121 = 865109^2 + 709239^2 .

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 3060877 + ... + 3445552.

Almost surely, 2^{1251433541002} is an apocalyptic number.

1251433541002 is a deficient number, since it is larger than the sum of its proper divisors (736489029758).

1251433541002 is a wasteful number, since it uses less digits than its factorization.

1251433541002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6512105.

The product of its (nonzero) digits is 14400, while the sum is 31.

Adding to 1251433541002 its reverse (2001453341521), we get a palindrome (3252886882523).

The spelling of 1251433541002 in words is "one trillion, two hundred fifty-one billion, four hundred thirty-three million, five hundred forty-one thousand, two".