1257531211415 has 8 divisors (see below), whose sum is σ = 1509043819248. Its totient is φ = 1006020725440.

The previous prime is 1257531211367. The next prime is 1257531211459. The reversal of 1257531211415 is 5141121357521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1257531211415 - 2³⁰ = 1256457469591 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1436300 + ... + 2139630.

It is an arithmetic number, because the mean of its divisors is an integer number (188630477406).

Almost surely, 2^{1257531211415} is an apocalyptic number.

1257531211415 is a deficient number, since it is larger than the sum of its proper divisors (251512607833).

1257531211415 is an equidigital number, since it uses as much as digits as its factorization.

1257531211415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1060929.

The product of its digits is 42000, while the sum is 38.

Adding to 1257531211415 its reverse (5141121357521), we get a palindrome (6398652568936).

The spelling of 1257531211415 in words is "one trillion, two hundred fifty-seven billion, five hundred thirty-one million, two hundred eleven thousand, four hundred fifteen".