7742731 has 4 divisors (see below), whose sum is σ = 7952032. Its totient is φ = 7533432.

The previous prime is 7742723. The next prime is 7742737. The reversal of 7742731 is 1372477.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1372477 = 853 ⋅1609.

It is a cyclic number.

It is not a de Polignac number, because 7742731 - 2³ = 7742723 is a prime.

It is a super-2 number, since 2×7742731² = 119899766676722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7742693 and 7742702.

It is not an unprimeable number, because it can be changed into a prime (7742737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 104595 + ... + 104668.

It is an arithmetic number, because the mean of its divisors is an integer number (1988008).

Almost surely, 2^7742731 is an apocalyptic number.

7742731 is a deficient number, since it is larger than the sum of its proper divisors (209301).

7742731 is a wasteful number, since it uses less digits than its factorization.

7742731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209300.

The product of its digits is 8232, while the sum is 31.

The square root of 7742731 is about 2782.5763242003. The cubic root of 7742731 is about 197.8326903473.

The spelling of 7742731 in words is "seven million, seven hundred forty-two thousand, seven hundred thirty-one".