1245396388 has 6 divisors (see below), whose sum is σ = 2179443686. Its totient is φ = 622698192.

The previous prime is 1245396371. The next prime is 1245396389. The reversal of 1245396388 is 8836935421.

It can be written as a sum of positive squares in only one way, i.e., 1115025664 + 130370724 = 33392^2 + 11418^2 .

It is not an unprimeable number, because it can be changed into a prime (1245396389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155674545 + ... + 155674552.

Almost surely, 2^1245396388 is an apocalyptic number.

It is an amenable number.

1245396388 is a deficient number, since it is larger than the sum of its proper divisors (934047298).

1245396388 is a wasteful number, since it uses less digits than its factorization.

1245396388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 311349101 (or 311349099 counting only the distinct ones).

The product of its digits is 1244160, while the sum is 49.

The square root of 1245396388 is about 35290.1740998823. The cubic root of 1245396388 is about 1075.8932940531.

The spelling of 1245396388 in words is "one billion, two hundred forty-five million, three hundred ninety-six thousand, three hundred eighty-eight".