1245401131 has 16 divisors (see below), whose sum is σ = 1391765760. Its totient is φ = 1107015840.

The previous prime is 1245401083. The next prime is 1245401197. The reversal of 1245401131 is 1311045421.

It is a cyclic number.

It is not a de Polignac number, because 1245401131 - 2¹¹ = 1245399083 is a prime.

It is a super-2 number, since 2×1245401131² = 3102047954192158322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1245401231) 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, 24000 + ... + 55378.

It is an arithmetic number, because the mean of its divisors is an integer number (86985360).

Almost surely, 2^1245401131 is an apocalyptic number.

1245401131 is a deficient number, since it is larger than the sum of its proper divisors (146364629).

1245401131 is a wasteful number, since it uses less digits than its factorization.

1245401131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31506.

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 1245401131 is about 35290.2412998268. The cubic root of 1245401131 is about 1075.8946598713.

Adding to 1245401131 its reverse (1311045421), we get a palindrome (2556446552).

The spelling of 1245401131 in words is "one billion, two hundred forty-five million, four hundred one thousand, one hundred thirty-one".