1620115 has 16 divisors (see below), whose sum is σ = 2278080. Its totient is φ = 1082880.

The previous prime is 1620107. The next prime is 1620121. The reversal of 1620115 is 5110261.

It is a happy number.

It is not a de Polignac number, because 1620115 - 2³ = 1620107 is a prime.

It is a super-2 number, since 2×1620115² = 5249545226450, which contains 22 as substring.

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, 871 + ... + 1999.

It is an arithmetic number, because the mean of its divisors is an integer number (142380).

2^1620115 is an apocalyptic number.

1620115 is a deficient number, since it is larger than the sum of its proper divisors (657965).

1620115 is a wasteful number, since it uses less digits than its factorization.

1620115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1182.

The product of its (nonzero) digits is 60, while the sum is 16.

The square root of 1620115 is about 1272.8373816007. The cubic root of 1620115 is about 117.4488082420.

Adding to 1620115 its reverse (5110261), we get a palindrome (6730376).

The spelling of 1620115 in words is "one million, six hundred twenty thousand, one hundred fifteen".