102400043 has 4 divisors (see below), whose sum is σ = 102558960. Its totient is φ = 102241128.

The previous prime is 102400031. The next prime is 102400069. The reversal of 102400043 is 340004201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 340004201 = 2789 ⋅121909.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102400043 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102400013) 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, 78488 + ... + 79781.

It is an arithmetic number, because the mean of its divisors is an integer number (25639740).

Almost surely, 2^102400043 is an apocalyptic number.

102400043 is a deficient number, since it is larger than the sum of its proper divisors (158917).

102400043 is an equidigital number, since it uses as much as digits as its factorization.

102400043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158916.

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 102400043 is about 10119.2906371939. The cubic root of 102400043 is about 467.8429035999.

Adding to 102400043 its reverse (340004201), we get a palindrome (442404244).

The spelling of 102400043 in words is "one hundred two million, four hundred thousand, forty-three".