748548421 has 4 divisors (see below), whose sum is σ = 750473100. Its totient is φ = 746623744.

The previous prime is 748548389. The next prime is 748548431. The reversal of 748548421 is 124845847.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 124845847 = 7 ⋅17835121.

It can be written as a sum of positive squares in 2 ways, for example, as 286083396 + 462465025 = 16914^2 + 21505^2 .

It is a cyclic number.

It is not a de Polignac number, because 748548421 - 2⁵ = 748548389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (748548431) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 961756 + ... + 962533.

It is an arithmetic number, because the mean of its divisors is an integer number (187618275).

Almost surely, 2^748548421 is an apocalyptic number.

It is an amenable number.

748548421 is a deficient number, since it is larger than the sum of its proper divisors (1924679).

748548421 is a wasteful number, since it uses less digits than its factorization.

748548421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1924678.

The product of its digits is 286720, while the sum is 43.

The square root of 748548421 is about 27359.6129541337. The cubic root of 748548421 is about 907.9737636108.

The spelling of 748548421 in words is "seven hundred forty-eight million, five hundred forty-eight thousand, four hundred twenty-one".