1340013261 has 16 divisors (see below), whose sum is σ = 1800843968. Its totient is φ = 886291200.

The previous prime is 1340013239. The next prime is 1340013293. The reversal of 1340013261 is 1623100431.

It is not a de Polignac number, because 1340013261 - 2⁶ = 1340013197 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 (1340013221) 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, 196926 + ... + 203616.

It is an arithmetic number, because the mean of its divisors is an integer number (112552748).

Almost surely, 2^1340013261 is an apocalyptic number.

It is an amenable number.

1340013261 is a deficient number, since it is larger than the sum of its proper divisors (460830707).

1340013261 is a wasteful number, since it uses less digits than its factorization.

1340013261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7212.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 1340013261 is about 36606.1915664550. The cubic root of 1340013261 is about 1102.4774082299.

Adding to 1340013261 its reverse (1623100431), we get a palindrome (2963113692).

The spelling of 1340013261 in words is "one billion, three hundred forty million, thirteen thousand, two hundred sixty-one".