1345290261 has 16 divisors (see below), whose sum is σ = 2054191104. Its totient is φ = 767152944.

The previous prime is 1345290227. The next prime is 1345290277. The reversal of 1345290261 is 1620925431.

It is not a de Polignac number, because 1345290261 - 2⁹ = 1345289749 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1345290281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55545 + ... + 75998.

It is an arithmetic number, because the mean of its divisors is an integer number (128386944).

Almost surely, 2^1345290261 is an apocalyptic number.

It is an amenable number.

1345290261 is a deficient number, since it is larger than the sum of its proper divisors (708900843).

1345290261 is a wasteful number, since it uses less digits than its factorization.

1345290261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132040.

The product of its (nonzero) digits is 12960, while the sum is 33.

The square root of 1345290261 is about 36678.1987153132. The cubic root of 1345290261 is about 1103.9227056458.

The spelling of 1345290261 in words is "one billion, three hundred forty-five million, two hundred ninety thousand, two hundred sixty-one".