1212706900 has 36 divisors (see below), whose sum is σ = 2786376348. Its totient is φ = 456547840.

The previous prime is 1212706889. The next prime is 1212706927. The reversal of 1212706900 is 96072121.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 73239364 + 1139467536 = 8558^2 + 33756^2 .

It is a super-2 number, since 2×1212706900² = 2941316050615220000, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 354979 + ... + 358378.

It is an arithmetic number, because the mean of its divisors is an integer number (77399343).

Almost surely, 2^1212706900 is an apocalyptic number.

1212706900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1212706900 is an abundant number, since it is smaller than the sum of its proper divisors (1573669448).

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

1212706900 is a wasteful number, since it uses less digits than its factorization.

1212706900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 713388 (or 713381 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 28.

The square root of 1212706900 is about 34823.9414770930. The cubic root of 1212706900 is about 1066.3962671801.

The spelling of 1212706900 in words is "one billion, two hundred twelve million, seven hundred six thousand, nine hundred".