420154135 has 4 divisors (see below), whose sum is σ = 504184968. Its totient is φ = 336123304.

The previous prime is 420154127. The next prime is 420154177. The reversal of 420154135 is 531451024.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 420154135 - 2³ = 420154127 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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, 42015409 + ... + 42015418.

It is an arithmetic number, because the mean of its divisors is an integer number (126046242).

Almost surely, 2^420154135 is an apocalyptic number.

420154135 is a deficient number, since it is larger than the sum of its proper divisors (84030833).

420154135 is an equidigital number, since it uses as much as digits as its factorization.

420154135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84030832.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 420154135 is about 20497.6616959106. The cubic root of 420154135 is about 748.9788384179.

The spelling of 420154135 in words is "four hundred twenty million, one hundred fifty-four thousand, one hundred thirty-five".