1361443257 has 12 divisors (see below), whose sum is σ = 1969521840. Its totient is φ = 906247608.

The previous prime is 1361443229. The next prime is 1361443289. The reversal of 1361443257 is 7523441631.

1361443257 is a `hidden beast` number, since 1 + 3 + 614 + 4 + 32 + 5 + 7 = 666.

It is not a de Polignac number, because 1361443257 - 2¹⁰ = 1361442233 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1361443207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 108843 + ... + 120704.

It is an arithmetic number, because the mean of its divisors is an integer number (164126820).

Almost surely, 2^1361443257 is an apocalyptic number.

It is an amenable number.

1361443257 is a deficient number, since it is larger than the sum of its proper divisors (608078583).

1361443257 is a wasteful number, since it uses less digits than its factorization.

1361443257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230212 (or 230209 counting only the distinct ones).

The product of its digits is 60480, while the sum is 36.

The square root of 1361443257 is about 36897.7405405805. The cubic root of 1361443257 is about 1108.3234319402.

Adding to 1361443257 its reverse (7523441631), we get a palindrome (8884884888).

The spelling of 1361443257 in words is "one billion, three hundred sixty-one million, four hundred forty-three thousand, two hundred fifty-seven".