1203861157 has 4 divisors (see below), whose sum is σ = 1203993216. Its totient is φ = 1203729100.

The previous prime is 1203861151. The next prime is 1203861167. The reversal of 1203861157 is 7511683021.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1203861157 - 2¹¹ = 1203859109 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 (1203861151) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51253 + ... + 70954.

It is an arithmetic number, because the mean of its divisors is an integer number (300998304).

Almost surely, 2^1203861157 is an apocalyptic number.

It is an amenable number.

1203861157 is a deficient number, since it is larger than the sum of its proper divisors (132059).

1203861157 is an equidigital number, since it uses as much as digits as its factorization.

1203861157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132058.

The product of its (nonzero) digits is 10080, while the sum is 34.

The square root of 1203861157 is about 34696.7023937434. The cubic root of 1203861157 is about 1063.7970965932.

The spelling of 1203861157 in words is "one billion, two hundred three million, eight hundred sixty-one thousand, one hundred fifty-seven".