212645642 has 24 divisors (see below), whose sum is σ = 355433988. Its totient is φ = 95325120.

The previous prime is 212645633. The next prime is 212645651. The reversal of 212645642 is 246546212.

212645642 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (212645633) and next prime (212645651).

It can be written as a sum of positive squares in 2 ways, for example, as 192404641 + 20241001 = 13871^2 + 4499^2 .

It is a junction number, because it is equal to n+sod(n) for n = 212645599 and 212645608.

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, 11648 + ... + 23684.

Almost surely, 2^212645642 is an apocalyptic number.

212645642 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

212645642 is a deficient number, since it is larger than the sum of its proper divisors (142788346).

212645642 is a wasteful number, since it uses less digits than its factorization.

212645642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12134 (or 12123 counting only the distinct ones).

The product of its digits is 23040, while the sum is 32.

The square root of 212645642 is about 14582.3743608508. The cubic root of 212645642 is about 596.8778952447.

The spelling of 212645642 in words is "two hundred twelve million, six hundred forty-five thousand, six hundred forty-two".