154061021 has 16 divisors (see below), whose sum is σ = 170054640. Its totient is φ = 138915840.

The previous prime is 154060997. The next prime is 154061023. The reversal of 154061021 is 120160451.

It can be written as a sum of positive squares in 8 ways, for example, as 9796900 + 144264121 = 3130^2 + 12011^2 .

It is not a de Polignac number, because 154061021 - 2⁶ = 154060957 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 154060984 and 154061002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (154061023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66401 + ... + 68681.

It is an arithmetic number, because the mean of its divisors is an integer number (10628415).

Almost surely, 2^154061021 is an apocalyptic number.

It is an amenable number.

154061021 is a deficient number, since it is larger than the sum of its proper divisors (15993619).

154061021 is a wasteful number, since it uses less digits than its factorization.

154061021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2464.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 154061021 is about 12412.1320086438. The cubic root of 154061021 is about 536.0816281061.

The spelling of 154061021 in words is "one hundred fifty-four million, sixty-one thousand, twenty-one".