3423256357421 has 2 divisors, whose sum is σ = 3423256357422. Its totient is φ = 3423256357420.

The previous prime is 3423256357397. The next prime is 3423256357447. The reversal of 3423256357421 is 1247536523243.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1983942675625 + 1439313681796 = 1408525^2 + 1199714^2 .

It is a cyclic number.

It is not a de Polignac number, because 3423256357421 - 2¹⁸ = 3423256095277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3423256357471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1711628178710 + 1711628178711.

It is an arithmetic number, because the mean of its divisors is an integer number (1711628178711).

Almost surely, 2^{3423256357421} is an apocalyptic number.

It is an amenable number.

3423256357421 is a deficient number, since it is larger than the sum of its proper divisors (1).

3423256357421 is an equidigital number, since it uses as much as digits as its factorization.

3423256357421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3628800, while the sum is 47.

The spelling of 3423256357421 in words is "three trillion, four hundred twenty-three billion, two hundred fifty-six million, three hundred fifty-seven thousand, four hundred twenty-one".