100070521 has 2 divisors, whose sum is σ = 100070522. Its totient is φ = 100070520.

The previous prime is 100070501. The next prime is 100070543. The reversal of 100070521 is 125070001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 75429225 + 24641296 = 8685^2 + 4964^2 .

It is a cyclic number.

It is not a de Polignac number, because 100070521 - 2²⁵ = 66516089 is a prime.

It is a super-2 number, since 2×100070521² = 20028218346422882, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 100070495 and 100070504.

It is not a weakly prime, because it can be changed into another prime (100070501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50035260 + 50035261.

It is an arithmetic number, because the mean of its divisors is an integer number (50035261).

Almost surely, 2^100070521 is an apocalyptic number.

It is an amenable number.

100070521 is a deficient number, since it is larger than the sum of its proper divisors (1).

100070521 is an equidigital number, since it uses as much as digits as its factorization.

100070521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 70, while the sum is 16.

The square root of 100070521 is about 10003.5254285677. The cubic root of 100070521 is about 464.2679675516.

The spelling of 100070521 in words is "one hundred million, seventy thousand, five hundred twenty-one".