42901951 has 4 divisors (see below), whose sum is σ = 43053832. Its totient is φ = 42750072.

The previous prime is 42901921. The next prime is 42901973. The reversal of 42901951 is 15910924.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 42901951 - 2¹⁷ = 42770879 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42901921) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 75516 + ... + 76081.

It is an arithmetic number, because the mean of its divisors is an integer number (10763458).

Almost surely, 2^42901951 is an apocalyptic number.

42901951 is a deficient number, since it is larger than the sum of its proper divisors (151881).

42901951 is a wasteful number, since it uses less digits than its factorization.

42901951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151880.

The product of its (nonzero) digits is 3240, while the sum is 31.

The square root of 42901951 is about 6549.9580914690. The cubic root of 42901951 is about 350.0733206936.

It can be divided in two parts, 4290 and 1951, that added together give a square (6241 = 79²).

The spelling of 42901951 in words is "forty-two million, nine hundred one thousand, nine hundred fifty-one".