1226258215 has 16 divisors (see below), whose sum is σ = 1811089728. Its totient is φ = 776180736.

The previous prime is 1226258207. The next prime is 1226258221. The reversal of 1226258215 is 5128526221.

It is a cyclic number.

It is not a de Polignac number, because 1226258215 - 2³ = 1226258207 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, 1347082 + ... + 1347991.

It is an arithmetic number, because the mean of its divisors is an integer number (113193108).

Almost surely, 2^1226258215 is an apocalyptic number.

1226258215 is a deficient number, since it is larger than the sum of its proper divisors (584831513).

1226258215 is a wasteful number, since it uses less digits than its factorization.

1226258215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2695098.

The product of its digits is 19200, while the sum is 34.

The square root of 1226258215 is about 35017.9698869024. The cubic root of 1226258215 is about 1070.3536883569.

The spelling of 1226258215 in words is "one billion, two hundred twenty-six million, two hundred fifty-eight thousand, two hundred fifteen".