1896421 has 2 divisors, whose sum is σ = 1896422. Its totient is φ = 1896420.

The previous prime is 1896413. The next prime is 1896431. The reversal of 1896421 is 1246981.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1852321 + 44100 = 1361^2 + 210^2 .

It is a cyclic number.

It is not a de Polignac number, because 1896421 - 2³ = 1896413 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1896431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 948210 + 948211.

It is an arithmetic number, because the mean of its divisors is an integer number (948211).

2^1896421 is an apocalyptic number.

It is an amenable number.

1896421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1896421 is an equidigital number, since it uses as much as digits as its factorization.

1896421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3456, while the sum is 31.

The square root of 1896421 is about 1377.1060235145. The cubic root of 1896421 is about 123.7784154045.

It can be divided in two parts, 1896 and 421, that multiplied together give a triangular number (798216 = T₁₂₆₃).

The spelling of 1896421 in words is "one million, eight hundred ninety-six thousand, four hundred twenty-one".