1254642101 has 2 divisors, whose sum is σ = 1254642102. Its totient is φ = 1254642100.

The previous prime is 1254642097. The next prime is 1254642119. The reversal of 1254642101 is 1012464521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 877699876 + 376942225 = 29626^2 + 19415^2 .

It is a cyclic number.

It is not a de Polignac number, because 1254642101 - 2² = 1254642097 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1254642401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 627321050 + 627321051.

It is an arithmetic number, because the mean of its divisors is an integer number (627321051).

Almost surely, 2^1254642101 is an apocalyptic number.

It is an amenable number.

1254642101 is a deficient number, since it is larger than the sum of its proper divisors (1).

1254642101 is an equidigital number, since it uses as much as digits as its factorization.

1254642101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 1254642101 is about 35420.9274440972. The cubic root of 1254642101 is about 1078.5491781635.

The spelling of 1254642101 in words is "one billion, two hundred fifty-four million, six hundred forty-two thousand, one hundred one".