1215513 has 16 divisors (see below), whose sum is σ = 1939840. Its totient is φ = 747792.

The previous prime is 1215509. The next prime is 1215521. The reversal of 1215513 is 3155121.

It is not a de Polignac number, because 1215513 - 2² = 1215509 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1215553) 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, 1381 + ... + 2082.

It is an arithmetic number, because the mean of its divisors is an integer number (121240).

2^1215513 is an apocalyptic number.

1215513 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1215513 is a deficient number, since it is larger than the sum of its proper divisors (724327).

1215513 is a wasteful number, since it uses less digits than its factorization.

1215513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3485 (or 3479 counting only the distinct ones).

The product of its digits is 150, while the sum is 18.

The square root of 1215513 is about 1102.5030612202. The cubic root of 1215513 is about 106.7218150155.

It can be divided in two parts, 1215 and 513, that added together give a cube (1728 = 12³).

The spelling of 1215513 in words is "one million, two hundred fifteen thousand, five hundred thirteen".