1712727421 has 2 divisors, whose sum is σ = 1712727422. Its totient is φ = 1712727420.

The previous prime is 1712727409. The next prime is 1712727427. The reversal of 1712727421 is 1247272171.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1043936100 + 668791321 = 32310^2 + 25861^2 .

It is a cyclic number.

It is not a de Polignac number, because 1712727421 - 2⁷ = 1712727293 is a prime.

It is a super-2 number, since 2×1712727421² = 5866870437290622482, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1712727427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 856363710 + 856363711.

It is an arithmetic number, because the mean of its divisors is an integer number (856363711).

Almost surely, 2^1712727421 is an apocalyptic number.

It is an amenable number.

1712727421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1712727421 is an equidigital number, since it uses as much as digits as its factorization.

1712727421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10976, while the sum is 34.

The square root of 1712727421 is about 41385.1111029075. Note that the first 4 decimals coincide. The cubic root of 1712727421 is about 1196.4542139408.

Adding to 1712727421 its reverse (1247272171), we get a palindrome (2959999592).

The spelling of 1712727421 in words is "one billion, seven hundred twelve million, seven hundred twenty-seven thousand, four hundred twenty-one".