1204020157 has 2 divisors, whose sum is σ = 1204020158. Its totient is φ = 1204020156.

The previous prime is 1204020149. The next prime is 1204020179. The reversal of 1204020157 is 7510204021.

It is a happy number.

It is an a-pointer prime, because the next prime (1204020179) can be obtained adding 1204020157 to its sum of digits (22).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1187422681 + 16597476 = 34459^2 + 4074^2 .

It is an emirp because it is prime and its reverse (7510204021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1204020157 - 2³ = 1204020149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1204020107) 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 as a sum of consecutive naturals, namely, 602010078 + 602010079.

It is an arithmetic number, because the mean of its divisors is an integer number (602010079).

Almost surely, 2^1204020157 is an apocalyptic number.

It is an amenable number.

1204020157 is a deficient number, since it is larger than the sum of its proper divisors (1).

1204020157 is an equidigital number, since it uses as much as digits as its factorization.

1204020157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 560, while the sum is 22.

The square root of 1204020157 is about 34698.9936021205. The cubic root of 1204020157 is about 1063.8439282098.

Adding to 1204020157 its reverse (7510204021), we get a palindrome (8714224178).

The spelling of 1204020157 in words is "one billion, two hundred four million, twenty thousand, one hundred fifty-seven".