42251401 has 2 divisors, whose sum is σ = 42251402. Its totient is φ = 42251400.

The previous prime is 42251387. The next prime is 42251423. The reversal of 42251401 is 10415224.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42237001 + 14400 = 6499^2 + 120^2 .

It is a cyclic number.

It is not a de Polignac number, because 42251401 - 2¹⁹ = 41727113 is a prime.

It is a Chen prime.

It is equal to p_2562004 and since 42251401 and 2562004 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (42251471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21125700 + 21125701.

It is an arithmetic number, because the mean of its divisors is an integer number (21125701).

Almost surely, 2^42251401 is an apocalyptic number.

It is an amenable number.

42251401 is a deficient number, since it is larger than the sum of its proper divisors (1).

42251401 is an equidigital number, since it uses as much as digits as its factorization.

42251401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 42251401 is about 6500.1077683374. The cubic root of 42251401 is about 348.2948381005.

Adding to 42251401 its reverse (10415224), we get a palindrome (52666625).

The spelling of 42251401 in words is "forty-two million, two hundred fifty-one thousand, four hundred one".