1013612004 has 36 divisors (see below), whose sum is σ = 2624682060. Its totient is φ = 329629440.

The previous prime is 1013611999. The next prime is 1013612009. The reversal of 1013612004 is 4002163101.

It is a happy number.

1013612004 is a `hidden beast` number, since 101 + 361 + 200 + 4 = 666.

It is an interprime number because it is at equal distance from previous prime (1013611999) and next prime (1013612009).

It can be written as a sum of positive squares in 2 ways, for example, as 175509504 + 838102500 = 13248^2 + 28950^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (1013612009) 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, 341889 + ... + 344840.

It is an arithmetic number, because the mean of its divisors is an integer number (72907835).

Almost surely, 2^1013612004 is an apocalyptic number.

It is an amenable number.

1013612004 is an abundant number, since it is smaller than the sum of its proper divisors (1611070056).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1013612004 is a wasteful number, since it uses less digits than its factorization.

1013612004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 686780 (or 686775 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 1013612004 is about 31837.2738154510. The cubic root of 1013612004 is about 1004.5169015485.

Adding to 1013612004 its reverse (4002163101), we get a palindrome (5015775105).

The spelling of 1013612004 in words is "one billion, thirteen million, six hundred twelve thousand, four".