1257209875950 has 192 divisors, whose sum is σ = 3587770368000. Its totient is φ = 285391290240.

The previous prime is 1257209875949. The next prime is 1257209875993. The reversal of 1257209875950 is 595789027521.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 262847259 + ... + 262852041.

It is an arithmetic number, because the mean of its divisors is an integer number (18686304000).

Almost surely, 2^{1257209875950} is an apocalyptic number.

1257209875950 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1257209875950, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1793885184000).

1257209875950 is an abundant number, since it is smaller than the sum of its proper divisors (2330560492050).

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

1257209875950 is a wasteful number, since it uses less digits than its factorization.

1257209875950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6471 (or 6466 counting only the distinct ones).

The product of its (nonzero) digits is 15876000, while the sum is 60.

The spelling of 1257209875950 in words is "one trillion, two hundred fifty-seven billion, two hundred nine million, eight hundred seventy-five thousand, nine hundred fifty".