7242781 has 32 divisors (see below), whose sum is σ = 9676800. Its totient is φ = 5261760.

The previous prime is 7242751. The next prime is 7242793. The reversal of 7242781 is 1872427.

It is not a de Polignac number, because 7242781 - 2¹¹ = 7240733 is a prime.

It is a super-2 number, since 2×7242781² = 104915753227922, which contains 22 as substring.

7242781 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7242751) 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 31 ways as a sum of consecutive naturals, for example, 101976 + ... + 102046.

It is an arithmetic number, because the mean of its divisors is an integer number (302400).

Almost surely, 2^7242781 is an apocalyptic number.

7242781 is a gapful number since it is divisible by the number (71) formed by its first and last digit.

It is an amenable number.

7242781 is a deficient number, since it is larger than the sum of its proper divisors (2434019).

7242781 is a wasteful number, since it uses less digits than its factorization.

7242781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169.

The product of its digits is 6272, while the sum is 31.

The square root of 7242781 is about 2691.2415350540. The cubic root of 7242781 is about 193.4795719431.

The spelling of 7242781 in words is "seven million, two hundred forty-two thousand, seven hundred eighty-one".