7142749 has 2 divisors, whose sum is σ = 7142750. Its totient is φ = 7142748.

The previous prime is 7142743. The next prime is 7142783. The reversal of 7142749 is 9472417.

It is an a-pointer prime, because the next prime (7142783) can be obtained adding 7142749 to its sum of digits (34).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5405625 + 1737124 = 2325^2 + 1318^2 .

It is a cyclic number.

It is not a de Polignac number, because 7142749 - 2⁷ = 7142621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7142743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3571374 + 3571375.

It is an arithmetic number, because the mean of its divisors is an integer number (3571375).

Almost surely, 2^7142749 is an apocalyptic number.

It is an amenable number.

7142749 is a deficient number, since it is larger than the sum of its proper divisors (1).

7142749 is an equidigital number, since it uses as much as digits as its factorization.

7142749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14112, while the sum is 34.

The square root of 7142749 is about 2672.5921873717. The cubic root of 7142749 is about 192.5847066348.

The spelling of 7142749 in words is "seven million, one hundred forty-two thousand, seven hundred forty-nine".