1630145 has 16 divisors (see below), whose sum is σ = 2161728. Its totient is φ = 1170240.

The previous prime is 1630141. The next prime is 1630159. The reversal of 1630145 is 5410361.

1630145 = T₈₀₅ + T₈₀₆ + ... + T₈₀₉.

It is not a de Polignac number, because 1630145 - 2² = 1630141 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1630141) 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, 5747 + ... + 6023.

It is an arithmetic number, because the mean of its divisors is an integer number (135108).

2^1630145 is an apocalyptic number.

It is an amenable number.

1630145 is a deficient number, since it is larger than the sum of its proper divisors (531583).

1630145 is a wasteful number, since it uses less digits than its factorization.

1630145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 1630145 is about 1276.7713186002. The cubic root of 1630145 is about 117.6906817885.

The spelling of 1630145 in words is "one million, six hundred thirty thousand, one hundred forty-five".