1240436145 has 32 divisors (see below), whose sum is σ = 2143314432. Its totient is φ = 608977152.

The previous prime is 1240436129. The next prime is 1240436149. The reversal of 1240436145 is 5416340421.

It is not a de Polignac number, because 1240436145 - 2⁴ = 1240436129 is a prime.

It is a super-2 number, since 2×1240436145² = 3077363659644922050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1240436149) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 62899 + ... + 80231.

It is an arithmetic number, because the mean of its divisors is an integer number (66978576).

Almost surely, 2^1240436145 is an apocalyptic number.

1240436145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1240436145 is a deficient number, since it is larger than the sum of its proper divisors (902878287).

1240436145 is a wasteful number, since it uses less digits than its factorization.

1240436145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17721.

The product of its (nonzero) digits is 11520, while the sum is 30.

The square root of 1240436145 is about 35219.8260217168. The cubic root of 1240436145 is about 1074.4630150256.

Adding to 1240436145 its reverse (5416340421), we get a palindrome (6656776566).

The spelling of 1240436145 in words is "one billion, two hundred forty million, four hundred thirty-six thousand, one hundred forty-five".