1259251353972 has 30 divisors (see below), whose sum is σ = 3291931781138. Its totient is φ = 419750451216.

The previous prime is 1259251353889. The next prime is 1259251353979. The reversal of 1259251353972 is 2793531529521.

1259251353972 is a `hidden beast` number, since 1 + 2 + 5 + 9 + 2 + 513 + 53 + 9 + 72 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1255641266916 + 3610087056 = 1120554^2 + 60084^2 .

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1259251353979) 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 9 ways as a sum of consecutive naturals, for example, 1943288803 + ... + 1943289450.

Almost surely, 2^{1259251353972} is an apocalyptic number.

1259251353972 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1259251353972 is an abundant number, since it is smaller than the sum of its proper divisors (2032680427166).

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

1259251353972 is a wasteful number, since it uses less digits than its factorization.

1259251353972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3886578269 (or 3886578258 counting only the distinct ones).

The product of its digits is 5103000, while the sum is 54.

The spelling of 1259251353972 in words is "one trillion, two hundred fifty-nine billion, two hundred fifty-one million, three hundred fifty-three thousand, nine hundred seventy-two".