42121470 has 32 divisors (see below), whose sum is σ = 101399040. Its totient is φ = 11198240.

The previous prime is 42121463. The next prime is 42121477. The reversal of 42121470 is 7412124.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (42121463) and next prime (42121477).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42121477) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8815 + ... + 12725.

It is an arithmetic number, because the mean of its divisors is an integer number (3168720).

Almost surely, 2^42121470 is an apocalyptic number.

42121470 is an abundant number, since it is smaller than the sum of its proper divisors (59277570).

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

42121470 is a wasteful number, since it uses less digits than its factorization.

42121470 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4280.

The product of its (nonzero) digits is 448, while the sum is 21.

The square root of 42121470 is about 6490.1055461371. The cubic root of 42121470 is about 347.9374474701.

Adding to 42121470 its reverse (7412124), we get a palindrome (49533594).

The spelling of 42121470 in words is "forty-two million, one hundred twenty-one thousand, four hundred seventy".