1257701552542 has 4 divisors (see below), whose sum is σ = 1886552328816. Its totient is φ = 628850776270.

The previous prime is 1257701552509. The next prime is 1257701552551. The reversal of 1257701552542 is 2452551077521.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 1257701552492 and 1257701552501.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 314425388134 + ... + 314425388137.

It is an arithmetic number, because the mean of its divisors is an integer number (471638082204).

Almost surely, 2^{1257701552542} is an apocalyptic number.

1257701552542 is a deficient number, since it is larger than the sum of its proper divisors (628850776274).

1257701552542 is an equidigital number, since it uses as much as digits as its factorization.

1257701552542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 628850776273.

The product of its (nonzero) digits is 980000, while the sum is 46.

The spelling of 1257701552542 in words is "one trillion, two hundred fifty-seven billion, seven hundred one million, five hundred fifty-two thousand, five hundred forty-two".