40742569 has 20 divisors (see below), whose sum is σ = 48401280. Its totient is φ = 34286280.

The previous prime is 40742549. The next prime is 40742573. The reversal of 40742569 is 96524704.

It is not a de Polignac number, because 40742569 - 2¹⁹ = 40218281 is a prime.

It is a super-2 number, since 2×40742569² = 3319913857439522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40742519) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 170352 + ... + 170590.

It is an arithmetic number, because the mean of its divisors is an integer number (2420064).

Almost surely, 2^40742569 is an apocalyptic number.

40742569 is a gapful number since it is divisible by the number (49) formed by its first and last digit.

It is an amenable number.

40742569 is a deficient number, since it is larger than the sum of its proper divisors (7658711).

40742569 is an frugal number, since it uses more digits than its factorization.

40742569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 338 (or 317 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 37.

The square root of 40742569 is about 6382.9906000244. The cubic root of 40742569 is about 344.0985188573.

The spelling of 40742569 in words is "forty million, seven hundred forty-two thousand, five hundred sixty-nine".