172042501 has 2 divisors, whose sum is σ = 172042502. Its totient is φ = 172042500.

The previous prime is 172042469. The next prime is 172042537. The reversal of 172042501 is 105240271.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 170929476 + 1113025 = 13074^2 + 1055^2 .

It is a cyclic number.

It is not a de Polignac number, because 172042501 - 2⁵ = 172042469 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (172042571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86021250 + 86021251.

It is an arithmetic number, because the mean of its divisors is an integer number (86021251).

Almost surely, 2^172042501 is an apocalyptic number.

It is an amenable number.

172042501 is a deficient number, since it is larger than the sum of its proper divisors (1).

172042501 is an equidigital number, since it uses as much as digits as its factorization.

172042501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 560, while the sum is 22.

The square root of 172042501 is about 13116.4972839550. The cubic root of 172042501 is about 556.1755792201.

Adding to 172042501 its reverse (105240271), we get a palindrome (277282772).

The spelling of 172042501 in words is "one hundred seventy-two million, forty-two thousand, five hundred one".