154653421 has 8 divisors (see below), whose sum is σ = 167537720. Its totient is φ = 142754976.

The previous prime is 154653397. The next prime is 154653427. The reversal of 154653421 is 124356451.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 37039396 + 117614025 = 6086^2 + 10845^2 .

It is not a de Polignac number, because 154653421 - 2¹¹ = 154651373 is a prime.

It is a super-5 number, since 5×154653421⁵ (a number of 42 digits) contains 55555 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 (154653427) 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 7 ways as a sum of consecutive naturals, for example, 33000 + ... + 37393.

It is an arithmetic number, because the mean of its divisors is an integer number (20942215).

Almost surely, 2^154653421 is an apocalyptic number.

It is an amenable number.

154653421 is a deficient number, since it is larger than the sum of its proper divisors (12884299).

154653421 is an frugal number, since it uses more digits than its factorization.

154653421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70432 (or 70406 counting only the distinct ones).

The product of its digits is 14400, while the sum is 31.

The square root of 154653421 is about 12435.9728610190. The cubic root of 154653421 is about 536.7678682562.

The spelling of 154653421 in words is "one hundred fifty-four million, six hundred fifty-three thousand, four hundred twenty-one".