126278025 has 24 divisors (see below), whose sum is σ = 210299040. Its totient is φ = 66858240.

The previous prime is 126278021. The next prime is 126278039. The reversal of 126278025 is 520872621.

It is not a de Polignac number, because 126278025 - 2² = 126278021 is a prime.

It is a super-2 number, since 2×126278025² = 31892279195801250, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (126278021) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4369 + ... + 16481.

It is an arithmetic number, because the mean of its divisors is an integer number (8762460).

Almost surely, 2^126278025 is an apocalyptic number.

126278025 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

126278025 is a deficient number, since it is larger than the sum of its proper divisors (84021015).

126278025 is a wasteful number, since it uses less digits than its factorization.

126278025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12265 (or 12260 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 33.

The square root of 126278025 is about 11237.3495540541. The cubic root of 126278025 is about 501.6982586380.

The spelling of 126278025 in words is "one hundred twenty-six million, two hundred seventy-eight thousand, twenty-five".