1261330 has 32 divisors (see below), whose sum is σ = 2670336. Its totient is φ = 419904.

The previous prime is 1261327. The next prime is 1261333. The reversal of 1261330 is 331621.

It is an interprime number because it is at equal distance from previous prime (1261327) and next prime (1261333).

It is not an unprimeable number, because it can be changed into a prime (1261333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2347 + ... + 2833.

It is an arithmetic number, because the mean of its divisors is an integer number (83448).

2^1261330 is an apocalyptic number.

1261330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1261330 is an abundant number, since it is smaller than the sum of its proper divisors (1409006).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1261330 is a wasteful number, since it uses less digits than its factorization.

1261330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 538.

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 1261330 is about 1123.0894888654. The cubic root of 1261330 is about 108.0462193577.

Adding to 1261330 its reverse (331621), we get a palindrome (1592951).

The spelling of 1261330 in words is "one million, two hundred sixty-one thousand, three hundred thirty".