42972151 has 2 divisors, whose sum is σ = 42972152. Its totient is φ = 42972150.

The previous prime is 42972131. The next prime is 42972161. The reversal of 42972151 is 15127924.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42972151 - 2⁷ = 42972023 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42972131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21486075 + 21486076.

It is an arithmetic number, because the mean of its divisors is an integer number (21486076).

Almost surely, 2^42972151 is an apocalyptic number.

42972151 is a deficient number, since it is larger than the sum of its proper divisors (1).

42972151 is an equidigital number, since it uses as much as digits as its factorization.

42972151 is an evil number, because the sum of its binary digits is even.

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

The square root of 42972151 is about 6555.3147140317. The cubic root of 42972151 is about 350.2641570440.

The spelling of 42972151 in words is "forty-two million, nine hundred seventy-two thousand, one hundred fifty-one".