40781247 has 16 divisors (see below), whose sum is σ = 58681728. Its totient is φ = 25043040.

The previous prime is 40781227. The next prime is 40781267. The reversal of 40781247 is 74218704.

It is an interprime number because it is at equal distance from previous prime (40781227) and next prime (40781267).

It is not a de Polignac number, because 40781247 - 2¹¹ = 40779199 is a prime.

It is a super-2 number, since 2×40781247² = 3326220213750018, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40781227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25872 + ... + 27402.

It is an arithmetic number, because the mean of its divisors is an integer number (3667608).

Almost surely, 2^40781247 is an apocalyptic number.

40781247 is a deficient number, since it is larger than the sum of its proper divisors (17900481).

40781247 is a wasteful number, since it uses less digits than its factorization.

40781247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2230.

The product of its (nonzero) digits is 12544, while the sum is 33.

The square root of 40781247 is about 6386.0196523343. The cubic root of 40781247 is about 344.2073716986.

The spelling of 40781247 in words is "forty million, seven hundred eighty-one thousand, two hundred forty-seven".