154085021 has 4 divisors (see below), whose sum is σ = 154117152. Its totient is φ = 154052892.

The previous prime is 154085017. The next prime is 154085023. The reversal of 154085021 is 120580451.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 120580451 = 73 ⋅1651787.

It is a cyclic number.

It is not a de Polignac number, because 154085021 - 2² = 154085017 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (154085023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7265 + ... + 18998.

It is an arithmetic number, because the mean of its divisors is an integer number (38529288).

Almost surely, 2^154085021 is an apocalyptic number.

It is an amenable number.

154085021 is a deficient number, since it is larger than the sum of its proper divisors (32131).

154085021 is an equidigital number, since it uses as much as digits as its factorization.

154085021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32130.

The product of its (nonzero) digits is 1600, while the sum is 26.

The square root of 154085021 is about 12413.0987670283. The cubic root of 154085021 is about 536.1094640267.

The spelling of 154085021 in words is "one hundred fifty-four million, eighty-five thousand, twenty-one".