154152421 has 4 divisors (see below), whose sum is σ = 156264172. Its totient is φ = 152040672.

The previous prime is 154152409. The next prime is 154152443. The reversal of 154152421 is 124251451.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 65529025 + 88623396 = 8095^2 + 9414^2 .

It is a cyclic number.

It is not a de Polignac number, because 154152421 - 2⁵ = 154152389 is a prime.

It is a super-2 number, since 2×154152421² = 47525937800322482, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (154152221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1055766 + ... + 1055911.

It is an arithmetic number, because the mean of its divisors is an integer number (39066043).

Almost surely, 2^154152421 is an apocalyptic number.

It is an amenable number.

154152421 is a deficient number, since it is larger than the sum of its proper divisors (2111751).

154152421 is an equidigital number, since it uses as much as digits as its factorization.

154152421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2111750.

The product of its digits is 1600, while the sum is 25.

The square root of 154152421 is about 12415.8133442799. The cubic root of 154152421 is about 536.1876211168.

The spelling of 154152421 in words is "one hundred fifty-four million, one hundred fifty-two thousand, four hundred twenty-one".