127722501 has 12 divisors (see below), whose sum is σ = 191321312. Its totient is φ = 85148172.

The previous prime is 127722481. The next prime is 127722521. The reversal of 127722501 is 105227721.

It is an interprime number because it is at equal distance from previous prime (127722481) and next prime (127722521).

It is not a de Polignac number, because 127722501 - 2¹⁸ = 127460357 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (127722521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 262561 + ... + 263046.

Almost surely, 2^127722501 is an apocalyptic number.

It is an amenable number.

127722501 is a deficient number, since it is larger than the sum of its proper divisors (63598811).

127722501 is an frugal number, since it uses more digits than its factorization.

127722501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 525622 (or 525610 counting only the distinct ones).

The product of its (nonzero) digits is 1960, while the sum is 27.

The square root of 127722501 is about 11301.4380058469. The cubic root of 127722501 is about 503.6039618379.

The spelling of 127722501 in words is "one hundred twenty-seven million, seven hundred twenty-two thousand, five hundred one".