42001252349989 has 2 divisors, whose sum is σ = 42001252349990. Its totient is φ = 42001252349988.

The previous prime is 42001252349977. The next prime is 42001252350017. The reversal of 42001252349989 is 98994325210024.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41611917532900 + 389334817089 = 6450730^2 + 623967^2 .

It is a cyclic number.

It is not a de Polignac number, because 42001252349989 - 2¹⁷ = 42001252218917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42001352349989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21000626174994 + 21000626174995.

It is an arithmetic number, because the mean of its divisors is an integer number (21000626174995).

Almost surely, 2^{42001252349989} is an apocalyptic number.

It is an amenable number.

42001252349989 is a deficient number, since it is larger than the sum of its proper divisors (1).

42001252349989 is an equidigital number, since it uses as much as digits as its factorization.

42001252349989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11197440, while the sum is 58.

The spelling of 42001252349989 in words is "forty-two trillion, one billion, two hundred fifty-two million, three hundred forty-nine thousand, nine hundred eighty-nine".