1421742403 has 2 divisors, whose sum is σ = 1421742404. Its totient is φ = 1421742402.

The previous prime is 1421742391. The next prime is 1421742451. The reversal of 1421742403 is 3042471241.

It is a weak prime.

It is an emirp because it is prime and its reverse (3042471241) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1421742403 is a prime.

It is not a weakly prime, because it can be changed into another prime (1421742473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 710871201 + 710871202.

It is an arithmetic number, because the mean of its divisors is an integer number (710871202).

Almost surely, 2^1421742403 is an apocalyptic number.

1421742403 is a deficient number, since it is larger than the sum of its proper divisors (1).

1421742403 is an equidigital number, since it uses as much as digits as its factorization.

1421742403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5376, while the sum is 28.

The square root of 1421742403 is about 37705.9995624039. Note that the first 3 decimals coincide. The cubic root of 1421742403 is about 1124.4504055924.

It can be divided in two parts, 1421742 and 403, that multiplied together give a triangular number (572962026 = T₃₃₈₅₁).

The spelling of 1421742403 in words is "one billion, four hundred twenty-one million, seven hundred forty-two thousand, four hundred three".