1243045477 has 2 divisors, whose sum is σ = 1243045478. Its totient is φ = 1243045476.

The previous prime is 1243045367. The next prime is 1243045523. The reversal of 1243045477 is 7745403421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 958583521 + 284461956 = 30961^2 + 16866^2 .

It is a cyclic number.

It is not a de Polignac number, because 1243045477 - 2²³ = 1234656869 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1243045277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621522738 + 621522739.

It is an arithmetic number, because the mean of its divisors is an integer number (621522739).

Almost surely, 2^1243045477 is an apocalyptic number.

It is an amenable number.

1243045477 is a deficient number, since it is larger than the sum of its proper divisors (1).

1243045477 is an equidigital number, since it uses as much as digits as its factorization.

1243045477 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 94080, while the sum is 37.

The square root of 1243045477 is about 35256.8500720073. The cubic root of 1243045477 is about 1075.2158865498.

Adding to 1243045477 its reverse (7745403421), we get a palindrome (8988448898).

The spelling of 1243045477 in words is "one billion, two hundred forty-three million, forty-five thousand, four hundred seventy-seven".