40102421 has 8 divisors (see below), whose sum is σ = 41420160. Its totient is φ = 38804128.

The previous prime is 40102411. The next prime is 40102427. The reversal of 40102421 is 12420104.

40102421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 40102421 - 2⁶ = 40102357 is a prime.

It is a super-2 number, since 2×40102421² = 3216408340122482, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 40102396 and 40102405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40102427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 611 + ... + 8976.

It is an arithmetic number, because the mean of its divisors is an integer number (5177520).

Almost surely, 2^40102421 is an apocalyptic number.

It is an amenable number.

40102421 is a deficient number, since it is larger than the sum of its proper divisors (1317739).

40102421 is an equidigital number, since it uses as much as digits as its factorization.

40102421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9723.

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 40102421 is about 6332.6472347668. The cubic root of 40102421 is about 342.2868362977.

Adding to 40102421 its reverse (12420104), we get a palindrome (52522525).

The spelling of 40102421 in words is "forty million, one hundred two thousand, four hundred twenty-one".