1340964261 has 32 divisors (see below), whose sum is σ = 2445067520. Its totient is φ = 707320512.

The previous prime is 1340964253. The next prime is 1340964269. The reversal of 1340964261 is 1624690431.

1340964261 is a `hidden beast` number, since 1 + 3 + 4 + 0 + 9 + 642 + 6 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (1340964253) and next prime (1340964269).

It is not a de Polignac number, because 1340964261 - 2³ = 1340964253 is a prime.

It is a super-3 number, since 3×1340964261³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1340964269) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 270430 + ... + 275343.

It is an arithmetic number, because the mean of its divisors is an integer number (76408360).

Almost surely, 2^1340964261 is an apocalyptic number.

It is an amenable number.

1340964261 is a deficient number, since it is larger than the sum of its proper divisors (1104103259).

1340964261 is a wasteful number, since it uses less digits than its factorization.

1340964261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 545802 (or 545796 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 1340964261 is about 36619.1788684563. The cubic root of 1340964261 is about 1102.7381539294.

The spelling of 1340964261 in words is "one billion, three hundred forty million, nine hundred sixty-four thousand, two hundred sixty-one".