40261421 has 2 divisors, whose sum is σ = 40261422. Its totient is φ = 40261420.

The previous prime is 40261411. The next prime is 40261433. The reversal of 40261421 is 12416204.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37039396 + 3222025 = 6086^2 + 1795^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40261421 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 40261393 and 40261402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40261411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20130710 + 20130711.

It is an arithmetic number, because the mean of its divisors is an integer number (20130711).

Almost surely, 2^40261421 is an apocalyptic number.

It is an amenable number.

40261421 is a deficient number, since it is larger than the sum of its proper divisors (1).

40261421 is an equidigital number, since it uses as much as digits as its factorization.

40261421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 40261421 is about 6345.1888072775. The cubic root of 40261421 is about 342.7386114984.

Adding to 40261421 its reverse (12416204), we get a palindrome (52677625).

The spelling of 40261421 in words is "forty million, two hundred sixty-one thousand, four hundred twenty-one".