42154919 has 2 divisors, whose sum is σ = 42154920. Its totient is φ = 42154918.

The previous prime is 42154909. The next prime is 42154927. The reversal of 42154919 is 91945124.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42154919 is a prime.

It is a super-2 number, since 2×42154919² = 3554074391793122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42154909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21077459 + 21077460.

It is an arithmetic number, because the mean of its divisors is an integer number (21077460).

Almost surely, 2^42154919 is an apocalyptic number.

42154919 is a deficient number, since it is larger than the sum of its proper divisors (1).

42154919 is an equidigital number, since it uses as much as digits as its factorization.

42154919 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12960, while the sum is 35.

The square root of 42154919 is about 6492.6819574040. The cubic root of 42154919 is about 348.0295230821.

The spelling of 42154919 in words is "forty-two million, one hundred fifty-four thousand, nine hundred nineteen".