1146749561 has 2 divisors, whose sum is σ = 1146749562. Its totient is φ = 1146749560.

The previous prime is 1146749557. The next prime is 1146749567. The reversal of 1146749561 is 1659476411.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1013785600 + 132963961 = 31840^2 + 11531^2 .

It is an emirp because it is prime and its reverse (1659476411) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1146749561 - 2² = 1146749557 is a prime.

It is not a weakly prime, because it can be changed into another prime (1146749567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 573374780 + 573374781.

It is an arithmetic number, because the mean of its divisors is an integer number (573374781).

Almost surely, 2^1146749561 is an apocalyptic number.

It is an amenable number.

1146749561 is a deficient number, since it is larger than the sum of its proper divisors (1).

1146749561 is an equidigital number, since it uses as much as digits as its factorization.

1146749561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 181440, while the sum is 44.

The square root of 1146749561 is about 33863.6908945260. The cubic root of 1146749561 is about 1046.7015344766.

The spelling of 1146749561 in words is "one billion, one hundred forty-six million, seven hundred forty-nine thousand, five hundred sixty-one".