42500000 has 96 divisors (see below), whose sum is σ = 110741904. Its totient is φ = 16000000.

The previous prime is 42499999. The next prime is 42500023. The reversal of 42500000 is 524.

It can be written as a sum of positive squares in 8 ways, for example, as 34904464 + 7595536 = 5908^2 + 2756^2 .

It is a sliding number, since 42500000 = 2500000 + 40000000 and 1/2500000 + 1/40000000 = 0.00000042500000.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2499992 + ... + 2500008.

Almost surely, 2^42500000 is an apocalyptic number.

42500000 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42500000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (55370952).

42500000 is an abundant number, since it is smaller than the sum of its proper divisors (68241904).

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

42500000 is an frugal number, since it uses more digits than its factorization.

42500000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62 (or 24 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 11.

The square root of 42500000 is about 6519.2024052026. The cubic root of 42500000 is about 348.9766023454.

Adding to 42500000 its reverse (524), we get a palindrome (42500524).

It can be divided in two parts, 4 and 2500000, that multiplied together give a 7-th power (10000000 = 10⁷).

The spelling of 42500000 in words is "forty-two million, five hundred thousand".