124728551 has 2 divisors, whose sum is σ = 124728552. Its totient is φ = 124728550.

The previous prime is 124728547. The next prime is 124728629. The reversal of 124728551 is 155827421.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 124728551 - 2² = 124728547 is a prime.

It is a super-2 number, since 2×124728551² = 31114422869119202, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (124728511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62364275 + 62364276.

It is an arithmetic number, because the mean of its divisors is an integer number (62364276).

Almost surely, 2^124728551 is an apocalyptic number.

124728551 is a deficient number, since it is larger than the sum of its proper divisors (1).

124728551 is an equidigital number, since it uses as much as digits as its factorization.

124728551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 22400, while the sum is 35.

The square root of 124728551 is about 11168.1937214574. The cubic root of 124728551 is about 499.6378056939.

The spelling of 124728551 in words is "one hundred twenty-four million, seven hundred twenty-eight thousand, five hundred fifty-one".