1969421 has 4 divisors (see below), whose sum is σ = 2055072. Its totient is φ = 1883772.

The previous prime is 1969411. The next prime is 1969423. The reversal of 1969421 is 1249691.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1969421 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 (1969423) 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, 42791 + ... + 42836.

It is an arithmetic number, because the mean of its divisors is an integer number (513768).

2^1969421 is an apocalyptic number.

It is an amenable number.

1969421 is a deficient number, since it is larger than the sum of its proper divisors (85651).

1969421 is an equidigital number, since it uses as much as digits as its factorization.

1969421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85650.

The product of its digits is 3888, while the sum is 32.

The square root of 1969421 is about 1403.3606093945. The cubic root of 1969421 is about 125.3466855839.

The spelling of 1969421 in words is "one million, nine hundred sixty-nine thousand, four hundred twenty-one".