1215501 has 8 divisors (see below), whose sum is σ = 1852224. Its totient is φ = 694560.

The previous prime is 1215499. The next prime is 1215509. The reversal of 1215501 is 1055121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1215501 - 2¹ = 1215499 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1215509) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28920 + ... + 28961.

It is an arithmetic number, because the mean of its divisors is an integer number (231528).

2^1215501 is an apocalyptic number.

It is an amenable number.

1215501 is a deficient number, since it is larger than the sum of its proper divisors (636723).

1215501 is an equidigital number, since it uses as much as digits as its factorization.

1215501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57891.

The product of its (nonzero) digits is 50, while the sum is 15.

The square root of 1215501 is about 1102.4976190450. The cubic root of 1215501 is about 106.7214638151.

The spelling of 1215501 in words is "one million, two hundred fifteen thousand, five hundred one".