1525605197 has 2 divisors, whose sum is σ = 1525605198. Its totient is φ = 1525605196.

The previous prime is 1525605161. The next prime is 1525605241. The reversal of 1525605197 is 7915065251.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 962302441 + 563302756 = 31021^2 + 23734^2 .

It is a cyclic number.

It is not a de Polignac number, because 1525605197 - 2²⁸ = 1257169741 is a prime.

It is a super-2 number, since 2×1525605197² = 4654942434226817618, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1525605797) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 762802598 + 762802599.

It is an arithmetic number, because the mean of its divisors is an integer number (762802599).

Almost surely, 2^1525605197 is an apocalyptic number.

It is an amenable number.

1525605197 is a deficient number, since it is larger than the sum of its proper divisors (1).

1525605197 is an equidigital number, since it uses as much as digits as its factorization.

1525605197 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 94500, while the sum is 41.

The square root of 1525605197 is about 39058.9963644741. The cubic root of 1525605197 is about 1151.1910022766.

The spelling of 1525605197 in words is "one billion, five hundred twenty-five million, six hundred five thousand, one hundred ninety-seven".