42015469 has 2 divisors, whose sum is σ = 42015470. Its totient is φ = 42015468.

The previous prime is 42015443. The next prime is 42015481. The reversal of 42015469 is 96451024.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41088100 + 927369 = 6410^2 + 963^2 .

It is a cyclic number.

It is not a de Polignac number, because 42015469 - 2⁷ = 42015341 is a prime.

It is a super-2 number, since 2×42015469² = 3530599270579922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 42015469.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42015419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21007734 + 21007735.

It is an arithmetic number, because the mean of its divisors is an integer number (21007735).

Almost surely, 2^42015469 is an apocalyptic number.

It is an amenable number.

42015469 is a deficient number, since it is larger than the sum of its proper divisors (1).

42015469 is an equidigital number, since it uses as much as digits as its factorization.

42015469 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 42015469 is about 6481.9340477978. The cubic root of 42015469 is about 347.6453343744.

The spelling of 42015469 in words is "forty-two million, fifteen thousand, four hundred sixty-nine".