42719251 has 6 divisors (see below), whose sum is σ = 42980756. Its totient is φ = 42459300.

The previous prime is 42719221. The next prime is 42719273. The reversal of 42719251 is 15291724.

It is a de Polignac number, because none of the positive numbers 2^k-42719251 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42719221) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 35896 + ... + 37066.

Almost surely, 2^42719251 is an apocalyptic number.

42719251 is a deficient number, since it is larger than the sum of its proper divisors (261505).

42719251 is an equidigital number, since it uses as much as digits as its factorization.

42719251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1553 (or 1362 counting only the distinct ones).

The product of its digits is 5040, while the sum is 31.

The square root of 42719251 is about 6535.9965575266. The cubic root of 42719251 is about 349.5756789814.

The spelling of 42719251 in words is "forty-two million, seven hundred nineteen thousand, two hundred fifty-one".