731042121 has 16 divisors (see below), whose sum is σ = 1014183360. Its totient is φ = 467826240.

The previous prime is 731042077. The next prime is 731042131. The reversal of 731042121 is 121240137.

It is not a de Polignac number, because 731042121 - 2⁹ = 731041609 is a prime.

It is not an unprimeable number, because it can be changed into a prime (731042131) 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, 9235 + ... + 39336.

It is an arithmetic number, because the mean of its divisors is an integer number (63386460).

Almost surely, 2^731042121 is an apocalyptic number.

It is an amenable number.

731042121 is a deficient number, since it is larger than the sum of its proper divisors (283141239).

731042121 is a wasteful number, since it uses less digits than its factorization.

731042121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48776.

The product of its (nonzero) digits is 336, while the sum is 21.

The square root of 731042121 is about 27037.7906087017. The cubic root of 731042121 is about 900.8395955236.

Adding to 731042121 its reverse (121240137), we get a palindrome (852282258).

The spelling of 731042121 in words is "seven hundred thirty-one million, forty-two thousand, one hundred twenty-one".