1211362260 has 96 divisors (see below), whose sum is σ = 3438167040. Its totient is φ = 318646272.

The previous prime is 1211362253. The next prime is 1211362267. The reversal of 1211362260 is 622631121.

It is an interprime number because it is at equal distance from previous prime (1211362253) and next prime (1211362267).

It is a self number, because there is not a number n which added to its sum of digits gives 1211362260.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211362267) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2528701 + ... + 2529179.

It is an arithmetic number, because the mean of its divisors is an integer number (35814240).

Almost surely, 2^1211362260 is an apocalyptic number.

1211362260 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1211362260, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1719083520).

1211362260 is an abundant number, since it is smaller than the sum of its proper divisors (2226804780).

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

1211362260 is a wasteful number, since it uses less digits than its factorization.

1211362260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 977 (or 975 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 1211362260 is about 34804.6298644304. The cubic root of 1211362260 is about 1066.0019841163.

Adding to 1211362260 its reverse (622631121), we get a palindrome (1833993381).

The spelling of 1211362260 in words is "one billion, two hundred eleven million, three hundred sixty-two thousand, two hundred sixty".