1213959541 has 8 divisors (see below), whose sum is σ = 1237464864. Its totient is φ = 1190476560.

The previous prime is 1213959499. The next prime is 1213959547. The reversal of 1213959541 is 1459593121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1213959541 - 2⁹ = 1213959029 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1213959494 and 1213959503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213959547) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 140550 + ... + 148936.

It is an arithmetic number, because the mean of its divisors is an integer number (154683108).

Almost surely, 2^1213959541 is an apocalyptic number.

It is an amenable number.

1213959541 is a deficient number, since it is larger than the sum of its proper divisors (23505323).

1213959541 is an equidigital number, since it uses as much as digits as its factorization.

1213959541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11171.

The product of its digits is 48600, while the sum is 40.

The square root of 1213959541 is about 34841.9221771704. The cubic root of 1213959541 is about 1066.7633116317.

The spelling of 1213959541 in words is "one billion, two hundred thirteen million, nine hundred fifty-nine thousand, five hundred forty-one".