1379421 has 6 divisors (see below), whose sum is σ = 1992510. Its totient is φ = 919608.

The previous prime is 1379387. The next prime is 1379423. The reversal of 1379421 is 1249731.

It can be written as a sum of positive squares in only one way, i.e., 756900 + 622521 = 870^2 + 789^2 .

It is not a de Polignac number, because 1379421 - 2¹⁰ = 1378397 is a prime.

It is a Curzon number.

1379421 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1379423) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 76626 + ... + 76643.

It is an arithmetic number, because the mean of its divisors is an integer number (332085).

2^1379421 is an apocalyptic number.

It is an amenable number.

1379421 is a deficient number, since it is larger than the sum of its proper divisors (613089).

1379421 is a wasteful number, since it uses less digits than its factorization.

1379421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153275 (or 153272 counting only the distinct ones).

The product of its digits is 1512, while the sum is 27.

The square root of 1379421 is about 1174.4875478267. The cubic root of 1379421 is about 111.3180554013.

The spelling of 1379421 in words is "one million, three hundred seventy-nine thousand, four hundred twenty-one".