739421 has 4 divisors (see below), whose sum is σ = 746844. Its totient is φ = 732000.

The previous prime is 739399. The next prime is 739433. The reversal of 739421 is 124937.

739421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 124937 = 101 ⋅1237.

It can be written as a sum of positive squares in 2 ways, for example, as 302500 + 436921 = 550^2 + 661^2 .

It is a cyclic number.

It is not a de Polignac number, because 739421 - 2¹⁸ = 477277 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (739021) 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, 3560 + ... + 3761.

It is an arithmetic number, because the mean of its divisors is an integer number (186711).

2⁷³⁹⁴²¹ is an apocalyptic number.

It is an amenable number.

739421 is a deficient number, since it is larger than the sum of its proper divisors (7423).

739421 is a wasteful number, since it uses less digits than its factorization.

739421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7422.

The product of its digits is 1512, while the sum is 26.

The square root of 739421 is about 859.8959239350. The cubic root of 739421 is about 90.4268203632.

The spelling of 739421 in words is "seven hundred thirty-nine thousand, four hundred twenty-one".