1205210157 has 8 divisors (see below), whose sum is σ = 1658784000. Its totient is φ = 777554880.

The previous prime is 1205210131. The next prime is 1205210179. The reversal of 1205210157 is 7510125021.

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

It is not a de Polignac number, because 1205210157 - 2¹⁰ = 1205209133 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1205210197) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6479532 + ... + 6479717.

It is an arithmetic number, because the mean of its divisors is an integer number (207348000).

Almost surely, 2^1205210157 is an apocalyptic number.

It is an amenable number.

1205210157 is a deficient number, since it is larger than the sum of its proper divisors (453573843).

1205210157 is a wasteful number, since it uses less digits than its factorization.

1205210157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12959283.

The product of its (nonzero) digits is 700, while the sum is 24.

The square root of 1205210157 is about 34716.1368386518. The cubic root of 1205210157 is about 1064.1942981540.

Adding to 1205210157 its reverse (7510125021), we get a palindrome (8715335178).

The spelling of 1205210157 in words is "one billion, two hundred five million, two hundred ten thousand, one hundred fifty-seven".