1225251510 has 32 divisors (see below), whose sum is σ = 3360690432. Its totient is φ = 280057440.

The previous prime is 1225251493. The next prime is 1225251539. The reversal of 1225251510 is 151525221.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2917056 + ... + 2917475.

It is an arithmetic number, because the mean of its divisors is an integer number (105021576).

Almost surely, 2^1225251510 is an apocalyptic number.

1225251510 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1225251510 is an abundant number, since it is smaller than the sum of its proper divisors (2135438922).

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

1225251510 is a wasteful number, since it uses less digits than its factorization.

1225251510 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5834548.

The product of its (nonzero) digits is 1000, while the sum is 24.

The square root of 1225251510 is about 35003.5928155954. The cubic root of 1225251510 is about 1070.0607034592.

Adding to 1225251510 its reverse (151525221), we get a palindrome (1376776731).

The spelling of 1225251510 in words is "one billion, two hundred twenty-five million, two hundred fifty-one thousand, five hundred ten".