1340264421 has 16 divisors (see below), whose sum is σ = 1989673600. Its totient is φ = 891666144.

The previous prime is 1340264417. The next prime is 1340264437. The reversal of 1340264421 is 1244620431.

It is a happy number.

1340264421 is a `hidden beast` number, since 13 + 4 + 0 + 2 + 644 + 2 + 1 = 666.

It is not a de Polignac number, because 1340264421 - 2² = 1340264417 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1340264461) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37816 + ... + 64113.

It is an arithmetic number, because the mean of its divisors is an integer number (124354600).

Almost surely, 2^1340264421 is an apocalyptic number.

It is an amenable number.

1340264421 is a deficient number, since it is larger than the sum of its proper divisors (649409179).

1340264421 is a wasteful number, since it uses less digits than its factorization.

1340264421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102425 (or 102419 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

The square root of 1340264421 is about 36609.6219729185. The cubic root of 1340264421 is about 1102.5462834010.

Adding to 1340264421 its reverse (1244620431), we get a palindrome (2584884852).

The spelling of 1340264421 in words is "one billion, three hundred forty million, two hundred sixty-four thousand, four hundred twenty-one".