1936421 has 4 divisors (see below), whose sum is σ = 1939212. Its totient is φ = 1933632.

The previous prime is 1936399. The next prime is 1936427. The reversal of 1936421 is 1246391.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1246391 = 29 ⋅42979.

It can be written as a sum of positive squares in 2 ways, for example, as 1852321 + 84100 = 1361^2 + 290^2 .

It is a cyclic number.

It is not a de Polignac number, because 1936421 - 2⁶ = 1936357 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1936427) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 551 + ... + 2043.

It is an arithmetic number, because the mean of its divisors is an integer number (484803).

2^1936421 is an apocalyptic number.

It is an amenable number.

1936421 is a deficient number, since it is larger than the sum of its proper divisors (2791).

1936421 is a wasteful number, since it uses less digits than its factorization.

1936421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2790.

The product of its digits is 1296, while the sum is 26.

The square root of 1936421 is about 1391.5534484884. The cubic root of 1936421 is about 124.6426272514.

The spelling of 1936421 in words is "one million, nine hundred thirty-six thousand, four hundred twenty-one".