1230215405 has 16 divisors (see below), whose sum is σ = 1533213360. Its totient is φ = 946801152.

The previous prime is 1230215381. The next prime is 1230215411. The reversal of 1230215405 is 5045120321.

It can be written as a sum of positive squares in 8 ways, for example, as 29929 + 1230185476 = 173^2 + 35074^2 .

It is a cyclic number.

It is not a de Polignac number, because 1230215405 - 2¹⁸ = 1229953261 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20894 + ... + 53823.

It is an arithmetic number, because the mean of its divisors is an integer number (95825835).

Almost surely, 2^1230215405 is an apocalyptic number.

It is an amenable number.

1230215405 is a deficient number, since it is larger than the sum of its proper divisors (302997955).

1230215405 is an equidigital number, since it uses as much as digits as its factorization.

1230215405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74848.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 1230215405 is about 35074.4266524772. The cubic root of 1230215405 is about 1071.5038117871.

Adding to 1230215405 its reverse (5045120321), we get a palindrome (6275335726).

The spelling of 1230215405 in words is "one billion, two hundred thirty million, two hundred fifteen thousand, four hundred five".