42121070 has 16 divisors (see below), whose sum is σ = 80278128. Its totient is φ = 15857280.

The previous prime is 42121067. The next prime is 42121097. The reversal of 42121070 is 7012124.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 123716 + ... + 124055.

It is an arithmetic number, because the mean of its divisors is an integer number (5017383).

Almost surely, 2^42121070 is an apocalyptic number.

42121070 is a deficient number, since it is larger than the sum of its proper divisors (38157058).

42121070 is a wasteful number, since it uses less digits than its factorization.

42121070 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247795.

The product of its (nonzero) digits is 112, while the sum is 17.

The square root of 42121070 is about 6490.0747299241. The cubic root of 42121070 is about 347.9363460886.

Adding to 42121070 its reverse (7012124), we get a palindrome (49133194).

The spelling of 42121070 in words is "forty-two million, one hundred twenty-one thousand, seventy".