1205542132 has 24 divisors (see below), whose sum is σ = 2148312096. Its totient is φ = 591828768.

The previous prime is 1205542123. The next prime is 1205542139. The reversal of 1205542132 is 2312455021.

It is a junction number, because it is equal to n+sod(n) for n = 1205542097 and 1205542106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1205542139) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42978 + ... + 65254.

It is an arithmetic number, because the mean of its divisors is an integer number (89513004).

Almost surely, 2^1205542132 is an apocalyptic number.

It is an amenable number.

1205542132 is a deficient number, since it is larger than the sum of its proper divisors (942769964).

1205542132 is a wasteful number, since it uses less digits than its factorization.

1205542132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22527 (or 22525 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 1205542132 is about 34720.9177874088. The cubic root of 1205542132 is about 1064.2919999165.

Adding to 1205542132 its reverse (2312455021), we get a palindrome (3517997153).

It can be divided in two parts, 120554 and 2132, that multiplied together give a triangular number (257021128 = T₂₂₆₇₂).

The spelling of 1205542132 in words is "one billion, two hundred five million, five hundred forty-two thousand, one hundred thirty-two".