1370401221 has 16 divisors (see below), whose sum is σ = 2155593728. Its totient is φ = 757825200.

The previous prime is 1370401189. The next prime is 1370401223. The reversal of 1370401221 is 1221040731.

It is not a de Polignac number, because 1370401221 - 2⁵ = 1370401189 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1370401223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1051885 + ... + 1053186.

It is an arithmetic number, because the mean of its divisors is an integer number (134724608).

Almost surely, 2^1370401221 is an apocalyptic number.

It is an amenable number.

1370401221 is a deficient number, since it is larger than the sum of its proper divisors (785192507).

1370401221 is a wasteful number, since it uses less digits than its factorization.

1370401221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2105112.

The product of its (nonzero) digits is 336, while the sum is 21.

The square root of 1370401221 is about 37018.9305761255. The cubic root of 1370401221 is about 1110.7489523805.

Adding to 1370401221 its reverse (1221040731), we get a palindrome (2591441952).

The spelling of 1370401221 in words is "one billion, three hundred seventy million, four hundred one thousand, two hundred twenty-one".