154274021 has 8 divisors (see below), whose sum is σ = 172404288. Its totient is φ = 136828000.

The previous prime is 154273993. The next prime is 154274023. The reversal of 154274021 is 120472451.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 154274021 - 2²² = 150079717 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (154274023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 170585 + ... + 171486.

It is an arithmetic number, because the mean of its divisors is an integer number (21550536).

Almost surely, 2^154274021 is an apocalyptic number.

154274021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

154274021 is a deficient number, since it is larger than the sum of its proper divisors (18130267).

154274021 is a wasteful number, since it uses less digits than its factorization.

154274021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 342123.

The product of its (nonzero) digits is 2240, while the sum is 26.

The square root of 154274021 is about 12420.7093597749. The cubic root of 154274021 is about 536.3285709589.

The spelling of 154274021 in words is "one hundred fifty-four million, two hundred seventy-four thousand, twenty-one".