1240104029 has 2 divisors, whose sum is σ = 1240104030. Its totient is φ = 1240104028.

The previous prime is 1240103933. The next prime is 1240104031. The reversal of 1240104029 is 9204010421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 897002500 + 343101529 = 29950^2 + 18523^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1240104029 is a prime.

Together with 1240104031, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 1240103995 and 1240104013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1240104329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 620052014 + 620052015.

It is an arithmetic number, because the mean of its divisors is an integer number (620052015).

Almost surely, 2^1240104029 is an apocalyptic number.

It is an amenable number.

1240104029 is a deficient number, since it is larger than the sum of its proper divisors (1).

1240104029 is an equidigital number, since it uses as much as digits as its factorization.

1240104029 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 1240104029 is about 35215.1108048803. The cubic root of 1240104029 is about 1074.3671137540.

The spelling of 1240104029 in words is "one billion, two hundred forty million, one hundred four thousand, twenty-nine".