1257394403472 has 20 divisors (see below), whose sum is σ = 3248268875760. Its totient is φ = 419131467808.

The previous prime is 1257394403423. The next prime is 1257394403477. The reversal of 1257394403472 is 2743044937521.

It is not an unprimeable number, because it can be changed into a prime (1257394403477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13097858322 + ... + 13097858417.

It is an arithmetic number, because the mean of its divisors is an integer number (162413443788).

Almost surely, 2^{1257394403472} is an apocalyptic number.

1257394403472 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1257394403472 is an abundant number, since it is smaller than the sum of its proper divisors (1990874472288).

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

1257394403472 is a wasteful number, since it uses less digits than its factorization.

1257394403472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26195716750 (or 26195716744 counting only the distinct ones).

The product of its (nonzero) digits is 5080320, while the sum is 51.

The spelling of 1257394403472 in words is "one trillion, two hundred fifty-seven billion, three hundred ninety-four million, four hundred three thousand, four hundred seventy-two".