122877421 has 2 divisors, whose sum is σ = 122877422. Its totient is φ = 122877420.

The previous prime is 122877383. The next prime is 122877449. The reversal of 122877421 is 124778221.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 122877225 + 196 = 11085^2 + 14^2 .

It is an emirp because it is prime and its reverse (124778221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 122877421 - 2⁹ = 122876909 is a prime.

It is a super-2 number, since 2×122877421² = 30197721183222482, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (122877121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61438710 + 61438711.

It is an arithmetic number, because the mean of its divisors is an integer number (61438711).

Almost surely, 2^122877421 is an apocalyptic number.

It is an amenable number.

122877421 is a deficient number, since it is larger than the sum of its proper divisors (1).

122877421 is an equidigital number, since it uses as much as digits as its factorization.

122877421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12544, while the sum is 34.

The square root of 122877421 is about 11085.0088407723. The cubic root of 122877421 is about 497.1537228238.

The spelling of 122877421 in words is "one hundred twenty-two million, eight hundred seventy-seven thousand, four hundred twenty-one".