42649501 has 2 divisors, whose sum is σ = 42649502. Its totient is φ = 42649500.

The previous prime is 42649489. The next prime is 42649513. The reversal of 42649501 is 10594624.

It is a balanced prime because it is at equal distance from previous prime (42649489) and next prime (42649513).

It can be written as a sum of positive squares in only one way, i.e., 40005625 + 2643876 = 6325^2 + 1626^2 .

It is a cyclic number.

It is not a de Polignac number, because 42649501 - 2⁵ = 42649469 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42649531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21324750 + 21324751.

It is an arithmetic number, because the mean of its divisors is an integer number (21324751).

Almost surely, 2^42649501 is an apocalyptic number.

It is an amenable number.

42649501 is a deficient number, since it is larger than the sum of its proper divisors (1).

42649501 is an equidigital number, since it uses as much as digits as its factorization.

42649501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 42649501 is about 6530.6585425974. The cubic root of 42649501 is about 349.3853183866.

The spelling of 42649501 in words is "forty-two million, six hundred forty-nine thousand, five hundred one".