742649 has 4 divisors (see below), whose sum is σ = 747264. Its totient is φ = 738036.

The previous prime is 742619. The next prime is 742657. The reversal of 742649 is 946247.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 946247 = 569 ⋅1663.

It is a cyclic number.

It is not a de Polignac number, because 742649 - 2⁸ = 742393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (742619) 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, 2057 + ... + 2390.

It is an arithmetic number, because the mean of its divisors is an integer number (186816).

2⁷⁴²⁶⁴⁹ is an apocalyptic number.

It is an amenable number.

742649 is a deficient number, since it is larger than the sum of its proper divisors (4615).

742649 is a wasteful number, since it uses less digits than its factorization.

742649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4614.

The product of its digits is 12096, while the sum is 32.

The square root of 742649 is about 861.7708512128. The cubic root of 742649 is about 90.5582177835.

The spelling of 742649 in words is "seven hundred forty-two thousand, six hundred forty-nine".