42451215 has 32 divisors (see below), whose sum is σ = 73336320. Its totient is φ = 20904576.

The previous prime is 42451207. The next prime is 42451219. The reversal of 42451215 is 51215424.

It is not a de Polignac number, because 42451215 - 2³ = 42451207 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42451219) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7884 + ... + 12126.

It is an arithmetic number, because the mean of its divisors is an integer number (2291760).

Almost surely, 2^42451215 is an apocalyptic number.

42451215 is a deficient number, since it is larger than the sum of its proper divisors (30885105).

42451215 is a wasteful number, since it uses less digits than its factorization.

42451215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4303.

The product of its digits is 1600, while the sum is 24.

The square root of 42451215 is about 6515.4596921476. The cubic root of 42451215 is about 348.8430231935.

Adding to 42451215 its reverse (51215424), we get a palindrome (93666639).

It can be divided in two parts, 4245 and 1215, that added together give a triangular number (5460 = T₁₀₄).

The spelling of 42451215 in words is "forty-two million, four hundred fifty-one thousand, two hundred fifteen".