1143260657 has 16 divisors (see below), whose sum is σ = 1426868352. Its totient is φ = 889912320.

The previous prime is 1143260633. The next prime is 1143260689. The reversal of 1143260657 is 7560623411.

It is not a de Polignac number, because 1143260657 - 2⁶ = 1143260593 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1143260627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70673 + ... + 85329.

It is an arithmetic number, because the mean of its divisors is an integer number (89179272).

Almost surely, 2^1143260657 is an apocalyptic number.

It is an amenable number.

1143260657 is a deficient number, since it is larger than the sum of its proper divisors (283607695).

1143260657 is a wasteful number, since it uses less digits than its factorization.

1143260657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15688.

The product of its (nonzero) digits is 30240, while the sum is 35.

The square root of 1143260657 is about 33812.1377170980. The cubic root of 1143260657 is about 1045.6389511377.

The spelling of 1143260657 in words is "one billion, one hundred forty-three million, two hundred sixty thousand, six hundred fifty-seven".