1257103142 has 8 divisors (see below), whose sum is σ = 1909524000. Its totient is φ = 620595144.

The previous prime is 1257103139. The next prime is 1257103153. The reversal of 1257103142 is 2413017521.

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

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 3978017 + ... + 3978332.

It is an arithmetic number, because the mean of its divisors is an integer number (238690500).

Almost surely, 2^1257103142 is an apocalyptic number.

1257103142 is a deficient number, since it is larger than the sum of its proper divisors (652420858).

1257103142 is an equidigital number, since it uses as much as digits as its factorization.

1257103142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7956430.

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 1257103142 is about 35455.6503536460. The cubic root of 1257103142 is about 1079.2539263109.

The spelling of 1257103142 in words is "one billion, two hundred fifty-seven million, one hundred three thousand, one hundred forty-two".