1261422415 has 16 divisors (see below), whose sum is σ = 1689722496. Its totient is φ = 896061600.

The previous prime is 1261422403. The next prime is 1261422433. The reversal of 1261422415 is 5142241621.

It is not a de Polignac number, because 1261422415 - 2¹¹ = 1261420367 is a prime.

It is a congruent number.

It is an unprimeable number.

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 in 15 ways as a sum of consecutive naturals, for example, 264321 + ... + 269050.

It is an arithmetic number, because the mean of its divisors is an integer number (105607656).

Almost surely, 2^1261422415 is an apocalyptic number.

1261422415 is a deficient number, since it is larger than the sum of its proper divisors (428300081).

1261422415 is a wasteful number, since it uses less digits than its factorization.

1261422415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 533430.

The product of its digits is 3840, while the sum is 28.

The square root of 1261422415 is about 35516.5090486101. The cubic root of 1261422415 is about 1080.4885806640.

The spelling of 1261422415 in words is "one billion, two hundred sixty-one million, four hundred twenty-two thousand, four hundred fifteen".