154245021 has 32 divisors (see below), whose sum is σ = 248816640. Its totient is φ = 83026944.

The previous prime is 154245019. The next prime is 154245031. The reversal of 154245021 is 120542451.

It is not a de Polignac number, because 154245021 - 2¹ = 154245019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 154244982 and 154245000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (154245001) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 76006 + ... + 78008.

It is an arithmetic number, because the mean of its divisors is an integer number (7775520).

Almost surely, 2^154245021 is an apocalyptic number.

It is an amenable number.

154245021 is a deficient number, since it is larger than the sum of its proper divisors (94571619).

154245021 is a wasteful number, since it uses less digits than its factorization.

154245021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2225.

The product of its (nonzero) digits is 1600, while the sum is 24.

The square root of 154245021 is about 12419.5418997643. The cubic root of 154245021 is about 536.2949630036.

Adding to 154245021 its reverse (120542451), we get a palindrome (274787472).

The spelling of 154245021 in words is "one hundred fifty-four million, two hundred forty-five thousand, twenty-one".