412156185421 has 2 divisors, whose sum is σ = 412156185422. Its totient is φ = 412156185420.

The previous prime is 412156185361. The next prime is 412156185437. The reversal of 412156185421 is 124581651214.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 353383880521 + 58772304900 = 594461^2 + 242430^2 .

It is a cyclic number.

It is not a de Polignac number, because 412156185421 - 2¹³ = 412156177229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (412156189421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 206078092710 + 206078092711.

It is an arithmetic number, because the mean of its divisors is an integer number (206078092711).

Almost surely, 2^412156185421 is an apocalyptic number.

It is an amenable number.

412156185421 is a deficient number, since it is larger than the sum of its proper divisors (1).

412156185421 is an equidigital number, since it uses as much as digits as its factorization.

412156185421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 76800, while the sum is 40.

The spelling of 412156185421 in words is "four hundred twelve billion, one hundred fifty-six million, one hundred eighty-five thousand, four hundred twenty-one".