100257487 has 4 divisors (see below), whose sum is σ = 109371816. Its totient is φ = 91143160.

The previous prime is 100257473. The next prime is 100257491. The reversal of 100257487 is 784752001.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 784752001 = 11 ⋅71341091.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-100257487 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100257407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4557148 + ... + 4557169.

It is an arithmetic number, because the mean of its divisors is an integer number (27342954).

Almost surely, 2^100257487 is an apocalyptic number.

100257487 is a deficient number, since it is larger than the sum of its proper divisors (9114329).

100257487 is an equidigital number, since it uses as much as digits as its factorization.

100257487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9114328.

The product of its (nonzero) digits is 15680, while the sum is 34.

The square root of 100257487 is about 10012.8660732080. The cubic root of 100257487 is about 464.5569248495.

The spelling of 100257487 in words is "one hundred million, two hundred fifty-seven thousand, four hundred eighty-seven".