1225401501 has 8 divisors (see below), whose sum is σ = 1634487040. Its totient is φ = 816625152.

The previous prime is 1225401491. The next prime is 1225401539. The reversal of 1225401501 is 1051045221.

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

It is not a de Polignac number, because 1225401501 - 2²¹ = 1223304349 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1225401581) 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, 67885 + ... + 84018.

It is an arithmetic number, because the mean of its divisors is an integer number (204310880).

Almost surely, 2^1225401501 is an apocalyptic number.

It is an amenable number.

1225401501 is a deficient number, since it is larger than the sum of its proper divisors (409085539).

1225401501 is a wasteful number, since it uses less digits than its factorization.

1225401501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154595.

The product of its (nonzero) digits is 400, while the sum is 21.

The square root of 1225401501 is about 35005.7352586687. The cubic root of 1225401501 is about 1070.1043660392.

Adding to 1225401501 its reverse (1051045221), we get a palindrome (2276446722).

The spelling of 1225401501 in words is "one billion, two hundred twenty-five million, four hundred one thousand, five hundred one".