131002421 has 8 divisors (see below), whose sum is σ = 146397888. Its totient is φ = 116188000.

The previous prime is 131002349. The next prime is 131002423. The reversal of 131002421 is 124200131.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131002421 is a prime.

It is a super-2 number, since 2×131002421² = 34323268615722482, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 131002396 and 131002405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131002423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 144785 + ... + 145686.

It is an arithmetic number, because the mean of its divisors is an integer number (18299736).

Almost surely, 2^131002421 is an apocalyptic number.

131002421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

131002421 is a deficient number, since it is larger than the sum of its proper divisors (15395467).

131002421 is a wasteful number, since it uses less digits than its factorization.

131002421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290523.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 131002421 is about 11445.6289036470. The cubic root of 131002421 is about 507.8784364610.

Adding to 131002421 its reverse (124200131), we get a palindrome (255202552).

The spelling of 131002421 in words is "one hundred thirty-one million, two thousand, four hundred twenty-one".