1396511505 has 12 divisors (see below), whose sum is σ = 2420620020. Its totient is φ = 744806112.

The previous prime is 1396511503. The next prime is 1396511507. The reversal of 1396511505 is 5051156931.

1396511505 is a `hidden beast` number, since 1 + 3 + 96 + 511 + 50 + 5 = 666.

It is an interprime number because it is at equal distance from previous prime (1396511503) and next prime (1396511507).

It can be written as a sum of positive squares in 2 ways, for example, as 317980224 + 1078531281 = 17832^2 + 32841^2 .

It is not a de Polignac number, because 1396511505 - 2¹ = 1396511503 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1396511505.

It is not an unprimeable number, because it can be changed into a prime (1396511503) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15516750 + ... + 15516839.

It is an arithmetic number, because the mean of its divisors is an integer number (201718335).

Almost surely, 2^1396511505 is an apocalyptic number.

1396511505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1396511505 is a deficient number, since it is larger than the sum of its proper divisors (1024108515).

1396511505 is a wasteful number, since it uses less digits than its factorization.

1396511505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31033600 (or 31033597 counting only the distinct ones).

The product of its (nonzero) digits is 20250, while the sum is 36.

The square root of 1396511505 is about 37369.9278163606. The cubic root of 1396511505 is about 1117.7589928664.

The spelling of 1396511505 in words is "one billion, three hundred ninety-six million, five hundred eleven thousand, five hundred five".