154414721 has 4 divisors (see below), whose sum is σ = 154469700. Its totient is φ = 154359744.

The previous prime is 154414697. The next prime is 154414747. The reversal of 154414721 is 127414451.

It is a happy number.

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 79834225 + 74580496 = 8935^2 + 8636^2 .

It is a cyclic number.

It is not a de Polignac number, because 154414721 - 2²² = 150220417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (154414781) 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 3 ways as a sum of consecutive naturals, for example, 23036 + ... + 28973.

It is an arithmetic number, because the mean of its divisors is an integer number (38617425).

Almost surely, 2^154414721 is an apocalyptic number.

It is an amenable number.

154414721 is a deficient number, since it is larger than the sum of its proper divisors (54979).

154414721 is an equidigital number, since it uses as much as digits as its factorization.

154414721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54978.

The product of its digits is 4480, while the sum is 29.

The square root of 154414721 is about 12426.3719966851. The cubic root of 154414721 is about 536.4915677280.

The spelling of 154414721 in words is "one hundred fifty-four million, four hundred fourteen thousand, seven hundred twenty-one".