840145041 has 24 divisors (see below), whose sum is σ = 1262649024. Its totient is φ = 558245520.

The previous prime is 840144979. The next prime is 840145087. The reversal of 840145041 is 140541048.

It is a happy number.

It is not a de Polignac number, because 840145041 - 2¹⁴ = 840128657 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 840144996 and 840145014.

It is not an unprimeable number, because it can be changed into a prime (840145091) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 70015 + ... + 81131.

It is an arithmetic number, because the mean of its divisors is an integer number (52610376).

Almost surely, 2^840145041 is an apocalyptic number.

840145041 is a gapful number since it is divisible by the number (81) formed by its first and last digit.

It is an amenable number.

840145041 is a deficient number, since it is larger than the sum of its proper divisors (422503983).

840145041 is a wasteful number, since it uses less digits than its factorization.

840145041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11443 (or 11431 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 27.

The square root of 840145041 is about 28985.2555793459. The cubic root of 840145041 is about 943.5930992120.

Adding to 840145041 its reverse (140541048), we get a palindrome (980686089).

The spelling of 840145041 in words is "eight hundred forty million, one hundred forty-five thousand, forty-one".