1630515 has 16 divisors (see below), whose sum is σ = 2647296. Its totient is φ = 856800.

The previous prime is 1630501. The next prime is 1630543. The reversal of 1630515 is 5150361.

It is a happy number.

It is not a de Polignac number, because 1630515 - 2⁵ = 1630483 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1630491 and 1630500.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 300 + ... + 1830.

It is an arithmetic number, because the mean of its divisors is an integer number (165456).

2^1630515 is an apocalyptic number.

1630515 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1630515 is a deficient number, since it is larger than the sum of its proper divisors (1016781).

1630515 is a wasteful number, since it uses less digits than its factorization.

1630515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1610.

The product of its (nonzero) digits is 450, while the sum is 21.

The square root of 1630515 is about 1276.9162071178. The cubic root of 1630515 is about 117.6995853437.

Adding to 1630515 its reverse (5150361), we get a palindrome (6780876).

It can be divided in two parts, 1630 and 515, that added together give a triangular number (2145 = T₆₅).

The spelling of 1630515 in words is "one million, six hundred thirty thousand, five hundred fifteen".