1212146380 has 24 divisors (see below), whose sum is σ = 2546615232. Its totient is φ = 484647552.

The previous prime is 1212146371. The next prime is 1212146387. The reversal of 1212146380 is 836412121.

It is not an unprimeable number, because it can be changed into a prime (1212146387) 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, 38944 + ... + 62776.

It is an arithmetic number, because the mean of its divisors is an integer number (106108968).

Almost surely, 2^1212146380 is an apocalyptic number.

1212146380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1212146380 is an abundant number, since it is smaller than the sum of its proper divisors (1334468852).

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

1212146380 is a wasteful number, since it uses less digits than its factorization.

1212146380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26385 (or 26383 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 1212146380 is about 34815.8926354043. The cubic root of 1212146380 is about 1066.2319437283.

The spelling of 1212146380 in words is "one billion, two hundred twelve million, one hundred forty-six thousand, three hundred eighty".