1557036245 has 8 divisors (see below), whose sum is σ = 1932872760. Its totient is φ = 1202676160.

The previous prime is 1557036241. The next prime is 1557036277. The reversal of 1557036245 is 5426307551.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 400560196 + 1156476049 = 20014^2 + 34007^2 .

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

It is not a de Polignac number, because 1557036245 - 2² = 1557036241 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1557036199 and 1557036208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1557036241) 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 7 ways as a sum of consecutive naturals, for example, 5368946 + ... + 5369235.

It is an arithmetic number, because the mean of its divisors is an integer number (241609095).

Almost surely, 2^1557036245 is an apocalyptic number.

It is an amenable number.

1557036245 is a deficient number, since it is larger than the sum of its proper divisors (375836515).

1557036245 is a wasteful number, since it uses less digits than its factorization.

1557036245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10738215.

The product of its (nonzero) digits is 126000, while the sum is 38.

The square root of 1557036245 is about 39459.2985872785. The cubic root of 1557036245 is about 1159.0430685638.

It can be divided in two parts, 15570 and 36245, that added together give a palindrome (51815).

The spelling of 1557036245 in words is "one billion, five hundred fifty-seven million, thirty-six thousand, two hundred forty-five".