1397609225 has 6 divisors (see below), whose sum is σ = 1733035470. Its totient is φ = 1118087360.

The previous prime is 1397609221. The next prime is 1397609231. The reversal of 1397609225 is 5229067931.

It can be written as a sum of positive squares in 3 ways, for example, as 942841 + 1396666384 = 971^2 + 37372^2 .

It is not a de Polignac number, because 1397609225 - 2² = 1397609221 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1397609221) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 27952160 + ... + 27952209.

It is an arithmetic number, because the mean of its divisors is an integer number (288839245).

Almost surely, 2^1397609225 is an apocalyptic number.

It is an amenable number.

1397609225 is a deficient number, since it is larger than the sum of its proper divisors (335426245).

1397609225 is an equidigital number, since it uses as much as digits as its factorization.

1397609225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55904379 (or 55904374 counting only the distinct ones).

The product of its (nonzero) digits is 204120, while the sum is 44.

The square root of 1397609225 is about 37384.6121418960. The cubic root of 1397609225 is about 1118.0517855500.

The spelling of 1397609225 in words is "one billion, three hundred ninety-seven million, six hundred nine thousand, two hundred twenty-five".