1692421 has 2 divisors, whose sum is σ = 1692422. Its totient is φ = 1692420.

The previous prime is 1692413. The next prime is 1692433. The reversal of 1692421 is 1242961.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1028196 + 664225 = 1014^2 + 815^2 .

It is a cyclic number.

It is not a de Polignac number, because 1692421 - 2³ = 1692413 is a prime.

1692421 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1692461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 846210 + 846211.

It is an arithmetic number, because the mean of its divisors is an integer number (846211).

2^1692421 is an apocalyptic number.

It is an amenable number.

1692421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1692421 is an equidigital number, since it uses as much as digits as its factorization.

1692421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 864, while the sum is 25.

The square root of 1692421 is about 1300.9308206050. The cubic root of 1692421 is about 119.1706940027.

The spelling of 1692421 in words is "one million, six hundred ninety-two thousand, four hundred twenty-one".