1257203291379 has 16 divisors (see below), whose sum is σ = 2028428840448. Its totient is φ = 676142946432.

The previous prime is 1257203291369. The next prime is 1257203291389. The reversal of 1257203291379 is 9731923027521.

It is an interprime number because it is at equal distance from previous prime (1257203291369) and next prime (1257203291389).

It is not a de Polignac number, because 1257203291379 - 2⁷ = 1257203291251 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is not an unprimeable number, because it can be changed into a prime (1257203291359) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 1760788567 + ... + 1760789280.

It is an arithmetic number, because the mean of its divisors is an integer number (126776802528).

Almost surely, 2^{1257203291379} is an apocalyptic number.

1257203291379 is a deficient number, since it is larger than the sum of its proper divisors (771225549069).

1257203291379 is a wasteful number, since it uses less digits than its factorization.

1257203291379 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3521577874.

The product of its (nonzero) digits is 1428840, while the sum is 51.

The spelling of 1257203291379 in words is "one trillion, two hundred fifty-seven billion, two hundred three million, two hundred ninety-one thousand, three hundred seventy-nine".