147157121 has 2 divisors, whose sum is σ = 147157122. Its totient is φ = 147157120.

The previous prime is 147157099. The next prime is 147157133. The reversal of 147157121 is 121751741.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 102414400 + 44742721 = 10120^2 + 6689^2 .

It is a cyclic number.

It is not a de Polignac number, because 147157121 - 2⁶ = 147157057 is a prime.

It is a super-2 number, since 2×147157121² = 43310436522017282, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (147157721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 73578560 + 73578561.

It is an arithmetic number, because the mean of its divisors is an integer number (73578561).

Almost surely, 2^147157121 is an apocalyptic number.

It is an amenable number.

147157121 is a deficient number, since it is larger than the sum of its proper divisors (1).

147157121 is an equidigital number, since it uses as much as digits as its factorization.

147157121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1960, while the sum is 29.

The square root of 147157121 is about 12130.8334833184. The cubic root of 147157121 is about 527.9511751321.

The spelling of 147157121 in words is "one hundred forty-seven million, one hundred fifty-seven thousand, one hundred twenty-one".