1240434111 has 16 divisors (see below), whose sum is σ = 1894466304. Its totient is φ = 707214144.

The previous prime is 1240434079. The next prime is 1240434127. The reversal of 1240434111 is 1114340421.

It is not a de Polignac number, because 1240434111 - 2⁵ = 1240434079 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1240434191) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57366 + ... + 75971.

It is an arithmetic number, because the mean of its divisors is an integer number (118404144).

Almost surely, 2^1240434111 is an apocalyptic number.

1240434111 is a deficient number, since it is larger than the sum of its proper divisors (654032193).

1240434111 is a wasteful number, since it uses less digits than its factorization.

1240434111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133790.

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 1240434111 is about 35219.7971459235. The cubic root of 1240434111 is about 1074.4624277432.

Adding to 1240434111 its reverse (1114340421), we get a palindrome (2354774532).

The spelling of 1240434111 in words is "one billion, two hundred forty million, four hundred thirty-four thousand, one hundred eleven".