154642420 has 12 divisors (see below), whose sum is σ = 324749124. Its totient is φ = 61856960.

The previous prime is 154642417. The next prime is 154642441. The reversal of 154642420 is 24246451.

It can be written as a sum of positive squares in 2 ways, for example, as 120956004 + 33686416 = 10998^2 + 5804^2 .

It is a congruent number.

It is an unprimeable number.

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, 3866041 + ... + 3866080.

It is an arithmetic number, because the mean of its divisors is an integer number (27062427).

Almost surely, 2^154642420 is an apocalyptic number.

154642420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

154642420 is an abundant number, since it is smaller than the sum of its proper divisors (170106704).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

154642420 is a wasteful number, since it uses less digits than its factorization.

154642420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7732130 (or 7732128 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 28.

The square root of 154642420 is about 12435.5305475882. The cubic root of 154642420 is about 536.7551406073.

Adding to 154642420 its reverse (24246451), we get a palindrome (178888871).

The spelling of 154642420 in words is "one hundred fifty-four million, six hundred forty-two thousand, four hundred twenty".