1261442330 has 32 divisors (see below), whose sum is σ = 2418963264. Its totient is φ = 471972096.

The previous prime is 1261442293. The next prime is 1261442341. The reversal of 1261442330 is 332441621.

It is a self number, because there is not a number n which added to its sum of digits gives 1261442330.

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, 4949 + ... + 50471.

It is an arithmetic number, because the mean of its divisors is an integer number (75592602).

Almost surely, 2^1261442330 is an apocalyptic number.

1261442330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1261442330 is a deficient number, since it is larger than the sum of its proper divisors (1157520934).

1261442330 is a wasteful number, since it uses less digits than its factorization.

1261442330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45710.

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 1261442330 is about 35516.7894100804. The cubic root of 1261442330 is about 1080.4942667891.

Adding to 1261442330 its reverse (332441621), we get a palindrome (1593883951).

The spelling of 1261442330 in words is "one billion, two hundred sixty-one million, four hundred forty-two thousand, three hundred thirty".