421434031 has 2 divisors, whose sum is σ = 421434032. Its totient is φ = 421434030.

The previous prime is 421434017. The next prime is 421434059. The reversal of 421434031 is 130434124.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-421434031 is a prime.

It is a super-2 number, since 2×421434031² = 355213284969817922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 421433993 and 421434011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (421437031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210717015 + 210717016.

It is an arithmetic number, because the mean of its divisors is an integer number (210717016).

Almost surely, 2^421434031 is an apocalyptic number.

421434031 is a deficient number, since it is larger than the sum of its proper divisors (1).

421434031 is an equidigital number, since it uses as much as digits as its factorization.

421434031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 421434031 is about 20528.8584923760. The cubic root of 421434031 is about 749.7385939368.

Adding to 421434031 its reverse (130434124), we get a palindrome (551868155).

The spelling of 421434031 in words is "four hundred twenty-one million, four hundred thirty-four thousand, thirty-one".