1002154202442 has 24 divisors (see below), whose sum is σ = 2195731121220. Its totient is φ = 330298013760.

The previous prime is 1002154202393. The next prime is 1002154202443. The reversal of 1002154202442 is 2442024512001.

It is a happy number.

1002154202442 is a `hidden beast` number, since 1 + 0 + 0 + 2 + 15 + 4 + 202 + 442 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 942202190241 + 59952012201 = 970671^2 + 244851^2 .

It is a super-2 number, since 2×1002154202442² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1002154202443) 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 11 ways as a sum of consecutive naturals, for example, 312780609 + ... + 312783812.

Almost surely, 2^{1002154202442} is an apocalyptic number.

1002154202442 is an abundant number, since it is smaller than the sum of its proper divisors (1193576918778).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1002154202442 is a wasteful number, since it uses less digits than its factorization.

1002154202442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 625564518 (or 625564515 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 27.

Adding to 1002154202442 its reverse (2442024512001), we get a palindrome (3444178714443).

The spelling of 1002154202442 in words is "one trillion, two billion, one hundred fifty-four million, two hundred two thousand, four hundred forty-two".