1142523511 has 4 divisors (see below), whose sum is σ = 1158174592. Its totient is φ = 1126872432.

The previous prime is 1142523509. The next prime is 1142523533. The reversal of 1142523511 is 1153252411.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1153252411 = 17957 ⋅64223.

It is a cyclic number.

It is not a de Polignac number, because 1142523511 - 2¹ = 1142523509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1142523541) 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, 7825431 + ... + 7825576.

It is an arithmetic number, because the mean of its divisors is an integer number (289543648).

Almost surely, 2^1142523511 is an apocalyptic number.

1142523511 is a deficient number, since it is larger than the sum of its proper divisors (15651081).

1142523511 is an equidigital number, since it uses as much as digits as its factorization.

1142523511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15651080.

The product of its digits is 1200, while the sum is 25.

The square root of 1142523511 is about 33801.2353472473. The cubic root of 1142523511 is about 1045.4141688344.

Adding to 1142523511 its reverse (1153252411), we get a palindrome (2295775922).

The spelling of 1142523511 in words is "one billion, one hundred forty-two million, five hundred twenty-three thousand, five hundred eleven".