1211434530 has 32 divisors (see below), whose sum is σ = 2911889088. Its totient is φ = 322555200.

The previous prime is 1211434529. The next prime is 1211434537. The reversal of 1211434530 is 354341121.

It is a happy number.

It is a super-3 number, since 3×1211434530³ (a number of 28 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1211434530.

It is not an unprimeable number, because it can be changed into a prime (1211434537) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10716 + ... + 50375.

It is an arithmetic number, because the mean of its divisors is an integer number (90996534).

Almost surely, 2^1211434530 is an apocalyptic number.

1211434530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1211434530 is an abundant number, since it is smaller than the sum of its proper divisors (1700454558).

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

1211434530 is a wasteful number, since it uses less digits than its factorization.

1211434530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61762.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 1211434530 is about 34805.6680728872. The cubic root of 1211434530 is about 1066.0231829583.

Adding to 1211434530 its reverse (354341121), we get a palindrome (1565775651).

The spelling of 1211434530 in words is "one billion, two hundred eleven million, four hundred thirty-four thousand, five hundred thirty".