1391225115 has 32 divisors (see below), whose sum is σ = 2555205120. Its totient is φ = 633176064.

The previous prime is 1391225113. The next prime is 1391225117. The reversal of 1391225115 is 5115221931.

It is an interprime number because it is at equal distance from previous prime (1391225113) and next prime (1391225117).

It is not a de Polignac number, because 1391225115 - 2¹ = 1391225113 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1391225113) 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, 5350 + ... + 53019.

It is an arithmetic number, because the mean of its divisors is an integer number (79850160).

Almost surely, 2^1391225115 is an apocalyptic number.

1391225115 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1391225115 is a deficient number, since it is larger than the sum of its proper divisors (1163980005).

1391225115 is a wasteful number, since it uses less digits than its factorization.

1391225115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58611.

The product of its digits is 2700, while the sum is 30.

The square root of 1391225115 is about 37299.1302177410. The cubic root of 1391225115 is about 1116.3468117344.

The spelling of 1391225115 in words is "one billion, three hundred ninety-one million, two hundred twenty-five thousand, one hundred fifteen".