154074421 has 4 divisors (see below), whose sum is σ = 154099872. Its totient is φ = 154048972.

The previous prime is 154074391. The next prime is 154074463. The reversal of 154074421 is 124470451.

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: 124470451 = 7 ⋅17781493.

It is a cyclic number.

It is not a de Polignac number, because 154074421 - 2¹³ = 154066229 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 154074421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (154074821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2160 + ... + 17686.

It is an arithmetic number, because the mean of its divisors is an integer number (38524968).

Almost surely, 2^154074421 is an apocalyptic number.

It is an amenable number.

154074421 is a deficient number, since it is larger than the sum of its proper divisors (25451).

154074421 is an equidigital number, since it uses as much as digits as its factorization.

154074421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25450.

The product of its (nonzero) digits is 4480, while the sum is 28.

The square root of 154074421 is about 12412.6717913590. The cubic root of 154074421 is about 536.0971701848.

The spelling of 154074421 in words is "one hundred fifty-four million, seventy-four thousand, four hundred twenty-one".