1525263243 has 16 divisors (see below), whose sum is σ = 2346779136. Its totient is φ = 863115840.

The previous prime is 1525263199. The next prime is 1525263253. The reversal of 1525263243 is 3423625251.

It is a happy number.

It is not a de Polignac number, because 1525263243 - 2¹⁴ = 1525246859 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1525263253) 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, 350418 + ... + 354743.

It is an arithmetic number, because the mean of its divisors is an integer number (146673696).

Almost surely, 2^1525263243 is an apocalyptic number.

1525263243 is a deficient number, since it is larger than the sum of its proper divisors (821515893).

1525263243 is a wasteful number, since it uses less digits than its factorization.

1525263243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 705274.

The product of its digits is 43200, while the sum is 33.

The square root of 1525263243 is about 39054.6187153325. The cubic root of 1525263243 is about 1151.1049853123.

Adding to 1525263243 its reverse (3423625251), we get a palindrome (4948888494).

The spelling of 1525263243 in words is "one billion, five hundred twenty-five million, two hundred sixty-three thousand, two hundred forty-three".