723421142 has 4 divisors (see below), whose sum is σ = 1085131716. Its totient is φ = 361710570.

The previous prime is 723421129. The next prime is 723421147. The reversal of 723421142 is 241124327.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 241124327 = 59 ⋅4086853.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (723421147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 180855284 + ... + 180855287.

It is an arithmetic number, because the mean of its divisors is an integer number (271282929).

Almost surely, 2^723421142 is an apocalyptic number.

723421142 is a deficient number, since it is larger than the sum of its proper divisors (361710574).

723421142 is a wasteful number, since it uses less digits than its factorization.

723421142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 361710573.

The product of its digits is 2688, while the sum is 26.

The square root of 723421142 is about 26896.4893991762. The cubic root of 723421142 is about 897.6982921708.

Adding to 723421142 its reverse (241124327), we get a palindrome (964545469).

The spelling of 723421142 in words is "seven hundred twenty-three million, four hundred twenty-one thousand, one hundred forty-two".