100255421 has 6 divisors (see below), whose sum is σ = 116623710. Its totient is φ = 85933176.

The previous prime is 100255399. The next prime is 100255423. The reversal of 100255421 is 124552001.

It can be written as a sum of positive squares in only one way, i.e., 62568100 + 37687321 = 7910^2 + 6139^2 .

It is not a de Polignac number, because 100255421 - 2²⁶ = 33146557 is a prime.

It is a super-2 number, since 2×100255421² = 20102298879774482, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 100255393 and 100255402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100255423) 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, 1022966 + ... + 1023063.

It is an arithmetic number, because the mean of its divisors is an integer number (19437285).

Almost surely, 2^100255421 is an apocalyptic number.

It is an amenable number.

100255421 is a deficient number, since it is larger than the sum of its proper divisors (16368289).

100255421 is an equidigital number, since it uses as much as digits as its factorization.

100255421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2046043 (or 2046036 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 100255421 is about 10012.7629054123. The cubic root of 100255421 is about 464.5537337954.

It can be divided in two parts, 10025 and 5421, that multiplied together give a triangular number (54345525 = T₁₀₄₂₅).

The spelling of 100255421 in words is "one hundred million, two hundred fifty-five thousand, four hundred twenty-one".