154263121 has 2 divisors, whose sum is σ = 154263122. Its totient is φ = 154263120.

The previous prime is 154263113. The next prime is 154263157. The reversal of 154263121 is 121362451.

It is a happy number.

154263121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 86694721 + 67568400 = 9311^2 + 8220^2 .

It is a cyclic number.

It is not a de Polignac number, because 154263121 - 2³ = 154263113 is a prime.

It is a super-2 number, since 2×154263121² = 47594221001321282, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (154263181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77131560 + 77131561.

It is an arithmetic number, because the mean of its divisors is an integer number (77131561).

Almost surely, 2^154263121 is an apocalyptic number.

It is an amenable number.

154263121 is a deficient number, since it is larger than the sum of its proper divisors (1).

154263121 is an equidigital number, since it uses as much as digits as its factorization.

154263121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1440, while the sum is 25.

The square root of 154263121 is about 12420.2705687115. The cubic root of 154263121 is about 536.3159394974.

The spelling of 154263121 in words is "one hundred fifty-four million, two hundred sixty-three thousand, one hundred twenty-one".