42620551 has 2 divisors, whose sum is σ = 42620552. Its totient is φ = 42620550.

The previous prime is 42620537. The next prime is 42620569. The reversal of 42620551 is 15502624.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42620551 - 2⁷ = 42620423 is a prime.

It is a super-2 number, since 2×42620551² = 3633022735087202, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42620531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21310275 + 21310276.

It is an arithmetic number, because the mean of its divisors is an integer number (21310276).

Almost surely, 2^42620551 is an apocalyptic number.

42620551 is a deficient number, since it is larger than the sum of its proper divisors (1).

42620551 is an equidigital number, since it uses as much as digits as its factorization.

42620551 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 42620551 is about 6528.4416976795. The cubic root of 42620551 is about 349.3062475560.

The spelling of 42620551 in words is "forty-two million, six hundred twenty thousand, five hundred fifty-one".