1212432400 has 45 divisors (see below), whose sum is σ = 2914542903. Its totient is φ = 484694400.

The previous prime is 1212432341. The next prime is 1212432407. The reversal of 1212432400 is 42342121.

The square root of 1212432400 is 34820.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 736145424 + 476286976 = 27132^2 + 21824^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1212432407) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 695530 + ... + 697270.

Almost surely, 2^1212432400 is an apocalyptic number.

1212432400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1212432400 is the 34820-th square number.

It is an amenable number.

1212432400 is an abundant number, since it is smaller than the sum of its proper divisors (1702110503).

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

1212432400 is an frugal number, since it uses more digits than its factorization.

1212432400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3500 (or 1748 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

The cubic root of 1212432400 is about 1066.3158003983.

Adding to 1212432400 its reverse (42342121), we get a palindrome (1254774521).

The spelling of 1212432400 in words is "one billion, two hundred twelve million, four hundred thirty-two thousand, four hundred".