542351261 has 2 divisors, whose sum is σ = 542351262. Its totient is φ = 542351260.

The previous prime is 542351213. The next prime is 542351267. The reversal of 542351261 is 162153245.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 442471225 + 99880036 = 21035^2 + 9994^2 .

It is a cyclic number.

It is not a de Polignac number, because 542351261 - 2⁶ = 542351197 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (542351267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 271175630 + 271175631.

It is an arithmetic number, because the mean of its divisors is an integer number (271175631).

Almost surely, 2^542351261 is an apocalyptic number.

It is an amenable number.

542351261 is a deficient number, since it is larger than the sum of its proper divisors (1).

542351261 is an equidigital number, since it uses as much as digits as its factorization.

542351261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7200, while the sum is 29.

The square root of 542351261 is about 23288.4362076976. The cubic root of 542351261 is about 815.5054818995.

The spelling of 542351261 in words is "five hundred forty-two million, three hundred fifty-one thousand, two hundred sixty-one".