1372221436 has 36 divisors (see below), whose sum is σ = 2561560848. Its totient is φ = 640973568.

The previous prime is 1372221421. The next prime is 1372221443. The reversal of 1372221436 is 6341222731.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1372221398 and 1372221407.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4953730 + ... + 4954006.

It is an arithmetic number, because the mean of its divisors is an integer number (71154468).

Almost surely, 2^1372221436 is an apocalyptic number.

It is an amenable number.

1372221436 is a deficient number, since it is larger than the sum of its proper divisors (1189339412).

1372221436 is a wasteful number, since it uses less digits than its factorization.

1372221436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 838 (or 559 counting only the distinct ones).

The product of its digits is 12096, while the sum is 31.

The square root of 1372221436 is about 37043.5073393436. The cubic root of 1372221436 is about 1111.2405133897.

The spelling of 1372221436 in words is "one billion, three hundred seventy-two million, two hundred twenty-one thousand, four hundred thirty-six".