1251454242140 has 48 divisors (see below), whose sum is σ = 2782758125952. Its totient is φ = 471116614656.

The previous prime is 1251454242133. The next prime is 1251454242163. The reversal of 1251454242140 is 412424541521.

It is a happy number.

It is a super-2 number, since 2×1251454242140² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1251454242140.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 10543202 + ... + 10661238.

It is an arithmetic number, because the mean of its divisors is an integer number (57974127624).

Almost surely, 2^{1251454242140} is an apocalyptic number.

1251454242140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1251454242140 is an abundant number, since it is smaller than the sum of its proper divisors (1531303883812).

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

1251454242140 is a wasteful number, since it uses less digits than its factorization.

1251454242140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149246 (or 149244 counting only the distinct ones).

The product of its (nonzero) digits is 51200, while the sum is 35.

Adding to 1251454242140 its reverse (412424541521), we get a palindrome (1663878783661).

The spelling of 1251454242140 in words is "one trillion, two hundred fifty-one billion, four hundred fifty-four million, two hundred forty-two thousand, one hundred forty".