1405521212 has 12 divisors (see below), whose sum is σ = 2462977776. Its totient is φ = 701813280.

The previous prime is 1405521209. The next prime is 1405521217. The reversal of 1405521212 is 2121255041.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1405521217) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 233489 + ... + 239432.

It is an arithmetic number, because the mean of its divisors is an integer number (205248148).

Almost surely, 2^1405521212 is an apocalyptic number.

It is an amenable number.

1405521212 is a deficient number, since it is larger than the sum of its proper divisors (1057456564).

1405521212 is a wasteful number, since it uses less digits than its factorization.

1405521212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 473668 (or 473666 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 23.

The square root of 1405521212 is about 37490.2815673609. The cubic root of 1405521212 is about 1120.1576128103.

Adding to 1405521212 its reverse (2121255041), we get a palindrome (3526776253).

The spelling of 1405521212 in words is "one billion, four hundred five million, five hundred twenty-one thousand, two hundred twelve".