42891426 has 12 divisors (see below), whose sum is σ = 92931462. Its totient is φ = 14297136.

The previous prime is 42891419. The next prime is 42891427. The reversal of 42891426 is 62419824.

It can be written as a sum of positive squares in only one way, i.e., 42889401 + 2025 = 6549^2 + 45^2 .

It is not an unprimeable number, because it can be changed into a prime (42891427) 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, 1191411 + ... + 1191446.

Almost surely, 2^42891426 is an apocalyptic number.

42891426 is an abundant number, since it is smaller than the sum of its proper divisors (50040036).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42891426 is a wasteful number, since it uses less digits than its factorization.

42891426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2382865 (or 2382862 counting only the distinct ones).

The product of its digits is 27648, while the sum is 36.

The square root of 42891426 is about 6549.1546019315. The cubic root of 42891426 is about 350.0446908919.

The spelling of 42891426 in words is "forty-two million, eight hundred ninety-one thousand, four hundred twenty-six".