1405250641 has 2 divisors, whose sum is σ = 1405250642. Its totient is φ = 1405250640.

The previous prime is 1405250591. The next prime is 1405250647. The reversal of 1405250641 is 1460525041.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1227801600 + 177449041 = 35040^2 + 13321^2 .

It is a cyclic number.

It is not a de Polignac number, because 1405250641 - 2⁷ = 1405250513 is a prime.

It is not a weakly prime, because it can be changed into another prime (1405250647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 702625320 + 702625321.

It is an arithmetic number, because the mean of its divisors is an integer number (702625321).

Almost surely, 2^1405250641 is an apocalyptic number.

It is an amenable number.

1405250641 is a deficient number, since it is larger than the sum of its proper divisors (1).

1405250641 is an equidigital number, since it uses as much as digits as its factorization.

1405250641 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 28.

The square root of 1405250641 is about 37486.6728451593. The cubic root of 1405250641 is about 1120.0857292477.

Adding to 1405250641 its reverse (1460525041), we get a palindrome (2865775682).

The spelling of 1405250641 in words is "one billion, four hundred five million, two hundred fifty thousand, six hundred forty-one".