749621 has 4 divisors (see below), whose sum is σ = 775500. Its totient is φ = 723744.

The previous prime is 749587. The next prime is 749641. The reversal of 749621 is 126947.

749621 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.

It can be written as a sum of positive squares in 2 ways, for example, as 148996 + 600625 = 386^2 + 775^2 .

It is a cyclic number.

It is not a de Polignac number, because 749621 - 2⁶ = 749557 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29), and also a Moran number because the ratio is a prime number: 25849 = 749621 / (7 + 4 + 9 + 6 + 2 + 1).

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 749621.

It is not an unprimeable number, because it can be changed into a prime (749641) 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, 12896 + ... + 12953.

It is an arithmetic number, because the mean of its divisors is an integer number (193875).

2⁷⁴⁹⁶²¹ is an apocalyptic number.

It is an amenable number.

749621 is a deficient number, since it is larger than the sum of its proper divisors (25879).

749621 is a wasteful number, since it uses less digits than its factorization.

749621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25878.

The product of its digits is 3024, while the sum is 29.

The square root of 749621 is about 865.8065603817. The cubic root of 749621 is about 90.8407228695.

The spelling of 749621 in words is "seven hundred forty-nine thousand, six hundred twenty-one".