126401055 has 16 divisors (see below), whose sum is σ = 220627584. Its totient is φ = 61285280.

The previous prime is 126400999. The next prime is 126401057. The reversal of 126401055 is 550104621.

It is not a de Polignac number, because 126401055 - 2¹⁰ = 126400031 is a prime.

It is a super-2 number, since 2×126401055² = 31954453410226050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126401057) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 382869 + ... + 383198.

It is an arithmetic number, because the mean of its divisors is an integer number (13789224).

Almost surely, 2^126401055 is an apocalyptic number.

126401055 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

126401055 is a deficient number, since it is larger than the sum of its proper divisors (94226529).

126401055 is a wasteful number, since it uses less digits than its factorization.

126401055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 766086.

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 126401055 is about 11242.8223769657. The cubic root of 126401055 is about 501.8611370754.

Adding to 126401055 its reverse (550104621), we get a palindrome (676505676).

It can be divided in two parts, 12640 and 1055, that added together give a triangular number (13695 = T₁₆₅).

The spelling of 126401055 in words is "one hundred twenty-six million, four hundred one thousand, fifty-five".