420724521478 has 8 divisors (see below), whose sum is σ = 632219794272. Its totient is φ = 209984590056.

The previous prime is 420724521463. The next prime is 420724521493. The reversal of 420724521478 is 874125427024.

It is an interprime number because it is at equal distance from previous prime (420724521463) and next prime (420724521493).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 188833950 + ... + 188836177.

It is an arithmetic number, because the mean of its divisors is an integer number (79027474284).

Almost surely, 2^420724521478 is an apocalyptic number.

420724521478 is a deficient number, since it is larger than the sum of its proper divisors (211495272794).

420724521478 is a wasteful number, since it uses less digits than its factorization.

420724521478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 377670686.

The product of its (nonzero) digits is 1003520, while the sum is 46.

The spelling of 420724521478 in words is "four hundred twenty billion, seven hundred twenty-four million, five hundred twenty-one thousand, four hundred seventy-eight".