1205100157 has 8 divisors (see below), whose sum is σ = 1272648384. Its totient is φ = 1138814688.

The previous prime is 1205100151. The next prime is 1205100173. The reversal of 1205100157 is 7510015021.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1205100157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1205100151) 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, 313728 + ... + 317545.

It is an arithmetic number, because the mean of its divisors is an integer number (159081048).

Almost surely, 2^1205100157 is an apocalyptic number.

It is an amenable number.

1205100157 is a deficient number, since it is larger than the sum of its proper divisors (67548227).

1205100157 is an equidigital number, since it uses as much as digits as its factorization.

1205100157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 631379.

The product of its (nonzero) digits is 350, while the sum is 22.

The square root of 1205100157 is about 34714.5525248418. The cubic root of 1205100157 is about 1064.1619206931.

Adding to 1205100157 its reverse (7510015021), we get a palindrome (8715115178).

The spelling of 1205100157 in words is "one billion, two hundred five million, one hundred thousand, one hundred fifty-seven".