42765403 has 2 divisors, whose sum is σ = 42765404. Its totient is φ = 42765402.

The previous prime is 42765367. The next prime is 42765431. The reversal of 42765403 is 30456724.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42765403 is a prime.

It is not a weakly prime, because it can be changed into another prime (42765433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21382701 + 21382702.

It is an arithmetic number, because the mean of its divisors is an integer number (21382702).

Almost surely, 2^42765403 is an apocalyptic number.

42765403 is a deficient number, since it is larger than the sum of its proper divisors (1).

42765403 is an equidigital number, since it uses as much as digits as its factorization.

42765403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20160, while the sum is 31.

The square root of 42765403 is about 6539.5262060795. The cubic root of 42765403 is about 349.7015224035.

The spelling of 42765403 in words is "forty-two million, seven hundred sixty-five thousand, four hundred three".