42603751476421 has 2 divisors, whose sum is σ = 42603751476422. Its totient is φ = 42603751476420.

The previous prime is 42603751476371. The next prime is 42603751476431. The reversal of 42603751476421 is 12467415730624.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 34789412045025 + 7814339431396 = 5898255^2 + 2795414^2 .

It is a cyclic number.

It is not a de Polignac number, because 42603751476421 - 2³⁵ = 42569391738053 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42603751476431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21301875738210 + 21301875738211.

It is an arithmetic number, because the mean of its divisors is an integer number (21301875738211).

Almost surely, 2^{42603751476421} is an apocalyptic number.

It is an amenable number.

42603751476421 is a deficient number, since it is larger than the sum of its proper divisors (1).

42603751476421 is an equidigital number, since it uses as much as digits as its factorization.

42603751476421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6773760, while the sum is 52.

The spelling of 42603751476421 in words is "forty-two trillion, six hundred three billion, seven hundred fifty-one million, four hundred seventy-six thousand, four hundred twenty-one".