420154142402 has 8 divisors (see below), whose sum is σ = 630383713596. Its totient is φ = 210026237872.

The previous prime is 420154142371. The next prime is 420154142417. The reversal of 420154142402 is 204241451024.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 413113422121 + 7040720281 = 642739^2 + 83909^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25406333 + ... + 25422864.

Almost surely, 2^420154142402 is an apocalyptic number.

420154142402 is a deficient number, since it is larger than the sum of its proper divisors (210229571194).

420154142402 is a wasteful number, since it uses less digits than its factorization.

420154142402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50833332.

The product of its (nonzero) digits is 10240, while the sum is 29.

Adding to 420154142402 its reverse (204241451024), we get a palindrome (624395593426).

The spelling of 420154142402 in words is "four hundred twenty billion, one hundred fifty-four million, one hundred forty-two thousand, four hundred two".