1278551003 has 2 divisors, whose sum is σ = 1278551004. Its totient is φ = 1278551002.

The previous prime is 1278550967. The next prime is 1278551039. The reversal of 1278551003 is 3001558721.

It is a balanced prime because it is at equal distance from previous prime (1278550967) and next prime (1278551039).

It is a cyclic number.

It is not a de Polignac number, because 1278551003 - 2⁶ = 1278550939 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (1278551203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 639275501 + 639275502.

It is an arithmetic number, because the mean of its divisors is an integer number (639275502).

Almost surely, 2^1278551003 is an apocalyptic number.

1278551003 is a deficient number, since it is larger than the sum of its proper divisors (1).

1278551003 is an equidigital number, since it uses as much as digits as its factorization.

1278551003 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8400, while the sum is 32.

The square root of 1278551003 is about 35756.8315570605. The cubic root of 1278551003 is about 1085.3571853800.

The spelling of 1278551003 in words is "one billion, two hundred seventy-eight million, five hundred fifty-one thousand, three".