1205420432 has 20 divisors (see below), whose sum is σ = 2437046400. Its totient is φ = 576505248.

The previous prime is 1205420429. The next prime is 1205420443. The reversal of 1205420432 is 2340245021.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a junction number, because it is equal to n+sod(n) for n = 1205420398 and 1205420407.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1637432 + ... + 1638167.

It is an arithmetic number, because the mean of its divisors is an integer number (121852320).

Almost surely, 2^1205420432 is an apocalyptic number.

It is an amenable number.

1205420432 is an abundant number, since it is smaller than the sum of its proper divisors (1231625968).

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

1205420432 is a wasteful number, since it uses less digits than its factorization.

1205420432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3275630 (or 3275624 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 1205420432 is about 34719.1651973373. The cubic root of 1205420432 is about 1064.2561851320.

Adding to 1205420432 its reverse (2340245021), we get a palindrome (3545665453).

The spelling of 1205420432 in words is "one billion, two hundred five million, four hundred twenty thousand, four hundred thirty-two".