1225478051 has 8 divisors (see below), whose sum is σ = 1400805984. Its totient is φ = 1050215040.

The previous prime is 1225478041. The next prime is 1225478053. The reversal of 1225478051 is 1508745221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1225478051 - 2¹⁸ = 1225215907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1225478053) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35021 + ... + 60641.

It is an arithmetic number, because the mean of its divisors is an integer number (175100748).

Almost surely, 2^1225478051 is an apocalyptic number.

1225478051 is a deficient number, since it is larger than the sum of its proper divisors (175327933).

1225478051 is an equidigital number, since it uses as much as digits as its factorization.

1225478051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32461.

The product of its (nonzero) digits is 22400, while the sum is 35.

The square root of 1225478051 is about 35006.8286338537. The cubic root of 1225478051 is about 1070.1266484730.

The spelling of 1225478051 in words is "one billion, two hundred twenty-five million, four hundred seventy-eight thousand, fifty-one".