1115401399 has 16 divisors (see below), whose sum is σ = 1408416768. Its totient is φ = 860694912.

The previous prime is 1115401373. The next prime is 1115401423. The reversal of 1115401399 is 9931045111.

It is not a de Polignac number, because 1115401399 - 2⁵ = 1115401367 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1115401349) 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, 201027 + ... + 206500.

It is an arithmetic number, because the mean of its divisors is an integer number (88026048).

Almost surely, 2^1115401399 is an apocalyptic number.

1115401399 is a deficient number, since it is larger than the sum of its proper divisors (293015369).

1115401399 is a wasteful number, since it uses less digits than its factorization.

1115401399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 407574.

The product of its (nonzero) digits is 4860, while the sum is 34.

The square root of 1115401399 is about 33397.6256491386. The cubic root of 1115401399 is about 1037.0755487165.

The spelling of 1115401399 in words is "one billion, one hundred fifteen million, four hundred one thousand, three hundred ninety-nine".