142440111 has 36 divisors (see below), whose sum is σ = 228020520. Its totient is φ = 85615200.

The previous prime is 142440107. The next prime is 142440119. The reversal of 142440111 is 111044241.

It is not a de Polignac number, because 142440111 - 2² = 142440107 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142440119) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 150901 + ... + 151841.

Almost surely, 2^142440111 is an apocalyptic number.

142440111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

142440111 is a deficient number, since it is larger than the sum of its proper divisors (85580409).

142440111 is a wasteful number, since it uses less digits than its factorization.

142440111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1108 (or 1094 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

The square root of 142440111 is about 11934.8276485251. The cubic root of 142440111 is about 522.2487804326.

Adding to 142440111 its reverse (111044241), we get a palindrome (253484352).

The spelling of 142440111 in words is "one hundred forty-two million, four hundred forty thousand, one hundred eleven".