154260121 has 4 divisors (see below), whose sum is σ = 155151972. Its totient is φ = 153368272.

The previous prime is 154260109. The next prime is 154260133. The reversal of 154260121 is 121062451.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 121062451 = 1087 ⋅111373.

It is an interprime number because it is at equal distance from previous prime (154260109) and next prime (154260133).

It can be written as a sum of positive squares in 2 ways, for example, as 140754496 + 13505625 = 11864^2 + 3675^2 .

It is a cyclic number.

It is not a de Polignac number, because 154260121 - 2¹⁹ = 153735833 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 154260092 and 154260101.

It is not an unprimeable number, because it can be changed into a prime (154263121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 445666 + ... + 446011.

It is an arithmetic number, because the mean of its divisors is an integer number (38787993).

Almost surely, 2^154260121 is an apocalyptic number.

It is an amenable number.

154260121 is a deficient number, since it is larger than the sum of its proper divisors (891851).

154260121 is an equidigital number, since it uses as much as digits as its factorization.

154260121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 891850.

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 154260121 is about 12420.1497978084. The cubic root of 154260121 is about 536.3124628439.

The spelling of 154260121 in words is "one hundred fifty-four million, two hundred sixty thousand, one hundred twenty-one".