1344400421 has 8 divisors (see below), whose sum is σ = 1654646784. Its totient is φ = 1063701360.

The previous prime is 1344400391. The next prime is 1344400451. The reversal of 1344400421 is 1240044431.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1344400391) and next prime (1344400451).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1344400421 - 2²² = 1340206117 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1344400451) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7386725 + ... + 7386906.

It is an arithmetic number, because the mean of its divisors is an integer number (206830848).

Almost surely, 2^1344400421 is an apocalyptic number.

It is an amenable number.

1344400421 is a deficient number, since it is larger than the sum of its proper divisors (310246363).

1344400421 is a wasteful number, since it uses less digits than its factorization.

1344400421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14773651.

The product of its (nonzero) digits is 1536, while the sum is 23.

The square root of 1344400421 is about 36666.0663420553. The cubic root of 1344400421 is about 1103.6792560171.

Adding to 1344400421 its reverse (1240044431), we get a palindrome (2584444852).

The spelling of 1344400421 in words is "one billion, three hundred forty-four million, four hundred thousand, four hundred twenty-one".