1397424565 has 8 divisors (see below), whose sum is σ = 1775551320. Its totient is φ = 1052178432.

The previous prime is 1397424563. The next prime is 1397424577. The reversal of 1397424565 is 5654247931.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 301682161 + 1095742404 = 17369^2 + 33102^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1397424565 - 2¹ = 1397424563 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1397424563) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8220060 + ... + 8220229.

It is an arithmetic number, because the mean of its divisors is an integer number (221943915).

Almost surely, 2^1397424565 is an apocalyptic number.

It is an amenable number.

1397424565 is a deficient number, since it is larger than the sum of its proper divisors (378126755).

1397424565 is a wasteful number, since it uses less digits than its factorization.

1397424565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16440311.

The product of its digits is 907200, while the sum is 46.

The square root of 1397424565 is about 37382.1423275874. The cubic root of 1397424565 is about 1118.0025422821.

The spelling of 1397424565 in words is "one billion, three hundred ninety-seven million, four hundred twenty-four thousand, five hundred sixty-five".