126021853 has 4 divisors (see below), whose sum is σ = 131501088. Its totient is φ = 120542620.

The previous prime is 126021803. The next prime is 126021893. The reversal of 126021853 is 358120621.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 126021853 - 2¹³ = 126013661 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 (126021803) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2739583 + ... + 2739628.

It is an arithmetic number, because the mean of its divisors is an integer number (32875272).

Almost surely, 2^126021853 is an apocalyptic number.

It is an amenable number.

126021853 is a deficient number, since it is larger than the sum of its proper divisors (5479235).

126021853 is an equidigital number, since it uses as much as digits as its factorization.

126021853 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5479234.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 126021853 is about 11225.9455281059. The cubic root of 126021853 is about 501.3587747840.

The spelling of 126021853 in words is "one hundred twenty-six million, twenty-one thousand, eight hundred fifty-three".