1405156241 has 2 divisors, whose sum is σ = 1405156242. Its totient is φ = 1405156240.

The previous prime is 1405156237. The next prime is 1405156253. The reversal of 1405156241 is 1426515041.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 734139025 + 671017216 = 27095^2 + 25904^2 .

It is a cyclic number.

It is not a de Polignac number, because 1405156241 - 2² = 1405156237 is a prime.

It is not a weakly prime, because it can be changed into another prime (1405156261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 702578120 + 702578121.

It is an arithmetic number, because the mean of its divisors is an integer number (702578121).

Almost surely, 2^1405156241 is an apocalyptic number.

It is an amenable number.

1405156241 is a deficient number, since it is larger than the sum of its proper divisors (1).

1405156241 is an equidigital number, since it uses as much as digits as its factorization.

1405156241 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4800, while the sum is 29.

The square root of 1405156241 is about 37485.4137098685. The cubic root of 1405156241 is about 1120.0606474918.

The spelling of 1405156241 in words is "one billion, four hundred five million, one hundred fifty-six thousand, two hundred forty-one".