1261393330 has 16 divisors (see below), whose sum is σ = 2297865024. Its totient is φ = 498478000.

The previous prime is 1261393321. The next prime is 1261393363. The reversal of 1261393330 is 333931621.

It is a super-2 number, since 2×1261393330² = 3182226265936977800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1261393292 and 1261393301.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 759046 + ... + 760705.

It is an arithmetic number, because the mean of its divisors is an integer number (143616564).

Almost surely, 2^1261393330 is an apocalyptic number.

1261393330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1261393330 is a deficient number, since it is larger than the sum of its proper divisors (1036471694).

1261393330 is a wasteful number, since it uses less digits than its factorization.

1261393330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1519841.

The product of its (nonzero) digits is 8748, while the sum is 31.

The square root of 1261393330 is about 35516.0995887780. The cubic root of 1261393330 is about 1080.4802762157.

The spelling of 1261393330 in words is "one billion, two hundred sixty-one million, three hundred ninety-three thousand, three hundred thirty".