1225001505 has 64 divisors (see below), whose sum is σ = 2517258240. Its totient is φ = 494436096.

The previous prime is 1225001489. The next prime is 1225001509. The reversal of 1225001505 is 5051005221.

It is not a de Polignac number, because 1225001505 - 2⁴ = 1225001489 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (1225001509) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 11886 + ... + 50904.

It is an arithmetic number, because the mean of its divisors is an integer number (39332160).

Almost surely, 2^1225001505 is an apocalyptic number.

1225001505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1225001505 is an abundant number, since it is smaller than the sum of its proper divisors (1292256735).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1225001505 is a wasteful number, since it uses less digits than its factorization.

1225001505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39070.

The product of its (nonzero) digits is 500, while the sum is 21.

The square root of 1225001505 is about 35000.0214999934. The cubic root of 1225001505 is about 1069.9879187502.

Adding to 1225001505 its reverse (5051005221), we get a palindrome (6276006726).

The spelling of 1225001505 in words is "one billion, two hundred twenty-five million, one thousand, five hundred five".