1340021401 has 4 divisors (see below), whose sum is σ = 1350250704. Its totient is φ = 1329792100.

The previous prime is 1340021381. The next prime is 1340021467. The reversal of 1340021401 is 1041200431.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1041200431 = 263 ⋅3958937.

It is a cyclic number.

It is not a de Polignac number, because 1340021401 - 2⁵ = 1340021369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1340021201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5114455 + ... + 5114716.

It is an arithmetic number, because the mean of its divisors is an integer number (337562676).

Almost surely, 2^1340021401 is an apocalyptic number.

It is an amenable number.

1340021401 is a deficient number, since it is larger than the sum of its proper divisors (10229303).

1340021401 is a wasteful number, since it uses less digits than its factorization.

1340021401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10229302.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 1340021401 is about 36606.3027496632. The cubic root of 1340021401 is about 1102.4796405830.

Adding to 1340021401 its reverse (1041200431), we get a palindrome (2381221832).

The spelling of 1340021401 in words is "one billion, three hundred forty million, twenty-one thousand, four hundred one".