42400725 has 12 divisors (see below), whose sum is σ = 70102656. Its totient is φ = 22613680.

The previous prime is 42400717. The next prime is 42400733. The reversal of 42400725 is 52700424.

It is an interprime number because it is at equal distance from previous prime (42400717) and next prime (42400733).

It is not a de Polignac number, because 42400725 - 2³ = 42400717 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42400695 and 42400704.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 282597 + ... + 282746.

It is an arithmetic number, because the mean of its divisors is an integer number (5841888).

Almost surely, 2^42400725 is an apocalyptic number.

It is an amenable number.

42400725 is a deficient number, since it is larger than the sum of its proper divisors (27701931).

42400725 is a wasteful number, since it uses less digits than its factorization.

42400725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 565356 (or 565351 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 24.

The square root of 42400725 is about 6511.5839086969. The cubic root of 42400725 is about 348.7046677373.

The spelling of 42400725 in words is "forty-two million, four hundred thousand, seven hundred twenty-five".