1211262552 has 64 divisors (see below), whose sum is σ = 3370329600. Its totient is φ = 403068960.

The previous prime is 1211262511. The next prime is 1211262557. The reversal of 1211262552 is 2552621121.

1211262552 is a `hidden beast` number, since 1 + 21 + 12 + 625 + 5 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211262557) 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, 131853 + ... + 140739.

It is an arithmetic number, because the mean of its divisors is an integer number (52661400).

Almost surely, 2^1211262552 is an apocalyptic number.

1211262552 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1211262552 is an abundant number, since it is smaller than the sum of its proper divisors (2159067048).

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

1211262552 is a wasteful number, since it uses less digits than its factorization.

1211262552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9533 (or 9523 counting only the distinct ones).

The product of its digits is 2400, while the sum is 27.

The square root of 1211262552 is about 34803.1974393158. The cubic root of 1211262552 is about 1065.9727355461.

Adding to 1211262552 its reverse (2552621121), we get a palindrome (3763883673).

The spelling of 1211262552 in words is "one billion, two hundred eleven million, two hundred sixty-two thousand, five hundred fifty-two".