157144121 has 2 divisors, whose sum is σ = 157144122. Its totient is φ = 157144120.

The previous prime is 157144067. The next prime is 157144123. The reversal of 157144121 is 121441751.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 103327225 + 53816896 = 10165^2 + 7336^2 .

It is an emirp because it is prime and its reverse (121441751) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 157144121 - 2¹⁰ = 157143097 is a prime.

Together with 157144123, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (157144123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78572060 + 78572061.

It is an arithmetic number, because the mean of its divisors is an integer number (78572061).

Almost surely, 2^157144121 is an apocalyptic number.

It is an amenable number.

157144121 is a deficient number, since it is larger than the sum of its proper divisors (1).

157144121 is an equidigital number, since it uses as much as digits as its factorization.

157144121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1120, while the sum is 26.

The square root of 157144121 is about 12535.7138209198. The cubic root of 157144121 is about 539.6340925354.

Adding to 157144121 its reverse (121441751), we get a palindrome (278585872).

The spelling of 157144121 in words is "one hundred fifty-seven million, one hundred forty-four thousand, one hundred twenty-one".