1421551403 has 2 divisors, whose sum is σ = 1421551404. Its totient is φ = 1421551402.

The previous prime is 1421551399. The next prime is 1421551423. The reversal of 1421551403 is 3041551241.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1421551403 - 2² = 1421551399 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (1421551423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 710775701 + 710775702.

It is an arithmetic number, because the mean of its divisors is an integer number (710775702).

Almost surely, 2^1421551403 is an apocalyptic number.

1421551403 is a deficient number, since it is larger than the sum of its proper divisors (1).

1421551403 is an equidigital number, since it uses as much as digits as its factorization.

1421551403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 1421551403 is about 37703.4667238969. The cubic root of 1421551403 is about 1124.4000496242.

The spelling of 1421551403 in words is "one billion, four hundred twenty-one million, five hundred fifty-one thousand, four hundred three".