1230405545 has 4 divisors (see below), whose sum is σ = 1476486660. Its totient is φ = 984324432.

The previous prime is 1230405479. The next prime is 1230405559. The reversal of 1230405545 is 5455040321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5455040321 = 3167 ⋅1722463.

It can be written as a sum of positive squares in 2 ways, for example, as 132411049 + 1097994496 = 11507^2 + 33136^2 .

It is a cyclic number.

It is not a de Polignac number, because 1230405545 - 2²⁴ = 1213628329 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 123040550 + ... + 123040559.

It is an arithmetic number, because the mean of its divisors is an integer number (369121665).

Almost surely, 2^1230405545 is an apocalyptic number.

It is an amenable number.

1230405545 is a deficient number, since it is larger than the sum of its proper divisors (246081115).

1230405545 is an equidigital number, since it uses as much as digits as its factorization.

1230405545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246081114.

The product of its (nonzero) digits is 12000, while the sum is 29.

The square root of 1230405545 is about 35077.1370696070. The cubic root of 1230405545 is about 1071.5590122120.

Adding to 1230405545 its reverse (5455040321), we get a palindrome (6685445866).

The spelling of 1230405545 in words is "one billion, two hundred thirty million, four hundred five thousand, five hundred forty-five".