1213001004 has 48 divisors (see below), whose sum is σ = 2897814528. Its totient is φ = 394737408.

The previous prime is 1213000961. The next prime is 1213001033. The reversal of 1213001004 is 4001003121.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (12).

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, 241729 + ... + 246695.

It is an arithmetic number, because the mean of its divisors is an integer number (60371136).

Almost surely, 2^1213001004 is an apocalyptic number.

It is an amenable number.

1213001004 is an abundant number, since it is smaller than the sum of its proper divisors (1684813524).

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

1213001004 is a wasteful number, since it uses less digits than its factorization.

1213001004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5454 (or 5452 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 1213001004 is about 34828.1639481613. The cubic root of 1213001004 is about 1066.4824671947.

Adding to 1213001004 its reverse (4001003121), we get a palindrome (5214004125).

The spelling of 1213001004 in words is "one billion, two hundred thirteen million, one thousand, four".