40761521 has 6 divisors (see below), whose sum is σ = 41332950. Its totient is φ = 40197888.

The previous prime is 40761509. The next prime is 40761533. The reversal of 40761521 is 12516704.

It is an interprime number because it is at equal distance from previous prime (40761509) and next prime (40761533).

It can be written as a sum of positive squares in 3 ways, for example, as 1210000 + 39551521 = 1100^2 + 6289^2 .

It is not a de Polignac number, because 40761521 - 2¹⁴ = 40745137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40761571) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1505 + ... + 9153.

It is an arithmetic number, because the mean of its divisors is an integer number (6888825).

Almost surely, 2^40761521 is an apocalyptic number.

It is an amenable number.

40761521 is a deficient number, since it is larger than the sum of its proper divisors (571429).

40761521 is an frugal number, since it uses more digits than its factorization.

40761521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7795 (or 7722 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 40761521 is about 6384.4749979932. The cubic root of 40761521 is about 344.1518647343.

The spelling of 40761521 in words is "forty million, seven hundred sixty-one thousand, five hundred twenty-one".