1345572399 has 32 divisors (see below), whose sum is σ = 1878448320. Its totient is φ = 856064000.

The previous prime is 1345572373. The next prime is 1345572407. The reversal of 1345572399 is 9932755431.

It is a cyclic number.

It is not a de Polignac number, because 1345572399 - 2¹¹ = 1345570351 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1345572499) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1105039 + ... + 1106255.

It is an arithmetic number, because the mean of its divisors is an integer number (58701510).

Almost surely, 2^1345572399 is an apocalyptic number.

1345572399 is a deficient number, since it is larger than the sum of its proper divisors (532875921).

1345572399 is a wasteful number, since it uses less digits than its factorization.

1345572399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1451.

The product of its digits is 1020600, while the sum is 48.

The square root of 1345572399 is about 36682.0446403959. The cubic root of 1345572399 is about 1103.9998728274. Note that the first 3 decimals are identical.

The spelling of 1345572399 in words is "one billion, three hundred forty-five million, five hundred seventy-two thousand, three hundred ninety-nine".