1155657407 has 2 divisors, whose sum is σ = 1155657408. Its totient is φ = 1155657406.

The previous prime is 1155657361. The next prime is 1155657409. The reversal of 1155657407 is 7047565511.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1155657407 - 2¹⁴ = 1155641023 is a prime.

Together with 1155657409, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1155657409) 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 as a sum of consecutive naturals, namely, 577828703 + 577828704.

It is an arithmetic number, because the mean of its divisors is an integer number (577828704).

Almost surely, 2^1155657407 is an apocalyptic number.

1155657407 is a deficient number, since it is larger than the sum of its proper divisors (1).

1155657407 is an equidigital number, since it uses as much as digits as its factorization.

1155657407 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 147000, while the sum is 41.

The square root of 1155657407 is about 33994.9614943156. The cubic root of 1155657407 is about 1049.4047743571.

The spelling of 1155657407 in words is "one billion, one hundred fifty-five million, six hundred fifty-seven thousand, four hundred seven".