1213001541 has 32 divisors (see below), whose sum is σ = 1821294720. Its totient is φ = 797818752.

The previous prime is 1213001539. The next prime is 1213001609. The reversal of 1213001541 is 1451003121.

1213001541 is a `hidden beast` number, since 121 + 3 + 0 + 0 + 1 + 541 = 666.

It is not a de Polignac number, because 1213001541 - 2¹ = 1213001539 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213001941) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 845761 + ... + 847193.

It is an arithmetic number, because the mean of its divisors is an integer number (56915460).

Almost surely, 2^1213001541 is an apocalyptic number.

It is an amenable number.

1213001541 is a deficient number, since it is larger than the sum of its proper divisors (608293179).

1213001541 is a wasteful number, since it uses less digits than its factorization.

1213001541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1842 (or 1836 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 1213001541 is about 34828.1716574385. The cubic root of 1213001541 is about 1066.4826245733.

Adding to 1213001541 its reverse (1451003121), we get a palindrome (2664004662).

The spelling of 1213001541 in words is "one billion, two hundred thirteen million, one thousand, five hundred forty-one".