1370045221 has 2 divisors, whose sum is σ = 1370045222. Its totient is φ = 1370045220.

The previous prime is 1370045203. The next prime is 1370045251. The reversal of 1370045221 is 1225400731.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1370036196 + 9025 = 37014^2 + 95^2 .

It is a cyclic number.

It is not a de Polignac number, because 1370045221 - 2¹¹ = 1370043173 is a prime.

It is a super-3 number, since 3×1370045221³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1370045251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 685022610 + 685022611.

It is an arithmetic number, because the mean of its divisors is an integer number (685022611).

Almost surely, 2^1370045221 is an apocalyptic number.

It is an amenable number.

1370045221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1370045221 is an equidigital number, since it uses as much as digits as its factorization.

1370045221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 1370045221 is about 37014.1219131293. The cubic root of 1370045221 is about 1110.6527613607.

Adding to 1370045221 its reverse (1225400731), we get a palindrome (2595445952).

The spelling of 1370045221 in words is "one billion, three hundred seventy million, forty-five thousand, two hundred twenty-one".