156454121 has 2 divisors, whose sum is σ = 156454122. Its totient is φ = 156454120.

The previous prime is 156454097. The next prime is 156454139. The reversal of 156454121 is 121454651.

156454121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 83539600 + 72914521 = 9140^2 + 8539^2 .

It is a cyclic number.

It is not a de Polignac number, because 156454121 - 2¹⁰ = 156453097 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (156454171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78227060 + 78227061.

It is an arithmetic number, because the mean of its divisors is an integer number (78227061).

Almost surely, 2^156454121 is an apocalyptic number.

It is an amenable number.

156454121 is a deficient number, since it is larger than the sum of its proper divisors (1).

156454121 is an equidigital number, since it uses as much as digits as its factorization.

156454121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4800, while the sum is 29.

The square root of 156454121 is about 12508.1621751559. The cubic root of 156454121 is about 538.8431119761.

The spelling of 156454121 in words is "one hundred fifty-six million, four hundred fifty-four thousand, one hundred twenty-one".