11142731 has 2 divisors, whose sum is σ = 11142732. Its totient is φ = 11142730.

The previous prime is 11142697. The next prime is 11142751. The reversal of 11142731 is 13724111.

It is a happy number.

It is an a-pointer prime, because the next prime (11142751) can be obtained adding 11142731 to its sum of digits (20).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11142731 - 2¹⁰ = 11141707 is a prime.

It is a super-2 number, since 2×11142731² = 248320908276722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11142751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5571365 + 5571366.

It is an arithmetic number, because the mean of its divisors is an integer number (5571366).

Almost surely, 2^11142731 is an apocalyptic number.

11142731 is a deficient number, since it is larger than the sum of its proper divisors (1).

11142731 is an equidigital number, since it uses as much as digits as its factorization.

11142731 is an evil number, because the sum of its binary digits is even.

The product of its digits is 168, while the sum is 20.

The square root of 11142731 is about 3338.0729470759. The cubic root of 11142731 is about 223.3557901727.

Adding to 11142731 its reverse (13724111), we get a palindrome (24866842).

The spelling of 11142731 in words is "eleven million, one hundred forty-two thousand, seven hundred thirty-one".