1557120126 has 8 divisors (see below), whose sum is σ = 3114240264. Its totient is φ = 519040040.

The previous prime is 1557120121. The next prime is 1557120137. The reversal of 1557120126 is 6210217551.

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

1557120126 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 1557120093 and 1557120102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1557120121) by changing a digit.

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, 129760005 + ... + 129760016.

It is an arithmetic number, because the mean of its divisors is an integer number (389280033).

Almost surely, 2^1557120126 is an apocalyptic number.

1557120126 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1557120126 is a wasteful number, since it uses less digits than its factorization.

1557120126 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259520026.

The product of its (nonzero) digits is 4200, while the sum is 30.

The square root of 1557120126 is about 39460.3614529822. The cubic root of 1557120126 is about 1159.0638815980.

Adding to 1557120126 its reverse (6210217551), we get a palindrome (7767337677).

The spelling of 1557120126 in words is "one billion, five hundred fifty-seven million, one hundred twenty thousand, one hundred twenty-six".