1900115 has 12 divisors (see below), whose sum is σ = 2617104. Its totient is φ = 1297344.

The previous prime is 1900111. The next prime is 1900121. The reversal of 1900115 is 5110091.

1900115 = 518² + 519² + ... + 524².

It is a happy number.

It is not a de Polignac number, because 1900115 - 2² = 1900111 is a prime.

It is a super-2 number, since 2×1900115² = 7220874026450, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1900093 and 1900102.

It is not an unprimeable number, because it can be changed into a prime (1900111) 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, 8039 + ... + 8271.

It is an arithmetic number, because the mean of its divisors is an integer number (218092).

2^1900115 is an apocalyptic number.

1900115 is a deficient number, since it is larger than the sum of its proper divisors (716989).

1900115 is an frugal number, since it uses more digits than its factorization.

1900115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 478 (or 245 counting only the distinct ones).

The product of its (nonzero) digits is 45, while the sum is 17.

The square root of 1900115 is about 1378.4465894622. The cubic root of 1900115 is about 123.8587317664.

The spelling of 1900115 in words is "one million, nine hundred thousand, one hundred fifteen".