1912421 has 12 divisors (see below), whose sum is σ = 2298240. Its totient is φ = 1585080.

The previous prime is 1912387. The next prime is 1912423. The reversal of 1912421 is 1242191.

It is not a de Polignac number, because 1912421 - 2⁶ = 1912357 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1912393 and 1912402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1912423) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 890 + ... + 2148.

It is an arithmetic number, because the mean of its divisors is an integer number (191520).

2^1912421 is an apocalyptic number.

It is an amenable number.

1912421 is a deficient number, since it is larger than the sum of its proper divisors (385819).

1912421 is a wasteful number, since it uses less digits than its factorization.

1912421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1304 (or 1297 counting only the distinct ones).

The product of its digits is 144, while the sum is 20.

The square root of 1912421 is about 1382.9031057887. The cubic root of 1912421 is about 124.1255448911.

The spelling of 1912421 in words is "one million, nine hundred twelve thousand, four hundred twenty-one".