420442154 has 16 divisors (see below), whose sum is σ = 688875840. Its totient is φ = 190865760.

The previous prime is 420442117. The next prime is 420442157. The reversal of 420442154 is 451244024.

It is not an unprimeable number, because it can be changed into a prime (420442157) 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 7 ways as a sum of consecutive naturals, for example, 5987 + ... + 29609.

It is an arithmetic number, because the mean of its divisors is an integer number (43054740).

Almost surely, 2^420442154 is an apocalyptic number.

420442154 is a deficient number, since it is larger than the sum of its proper divisors (268433686).

420442154 is a wasteful number, since it uses less digits than its factorization.

420442154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24445.

The product of its (nonzero) digits is 5120, while the sum is 26.

The square root of 420442154 is about 20504.6861473176. The cubic root of 420442154 is about 749.1499429755.

Adding to 420442154 its reverse (451244024), we get a palindrome (871686178).

The spelling of 420442154 in words is "four hundred twenty million, four hundred forty-two thousand, one hundred fifty-four".