1243401497 has 16 divisors (see below), whose sum is σ = 1376696832. Its totient is φ = 1115812800.

The previous prime is 1243401493. The next prime is 1243401499. The reversal of 1243401497 is 7941043421.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1243401497 - 2² = 1243401493 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1243401493) 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, 85523 + ... + 98999.

It is an arithmetic number, because the mean of its divisors is an integer number (86043552).

Almost surely, 2^1243401497 is an apocalyptic number.

It is an amenable number.

1243401497 is a deficient number, since it is larger than the sum of its proper divisors (133295335).

1243401497 is a wasteful number, since it uses less digits than its factorization.

1243401497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13688.

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 1243401497 is about 35261.8986584670. The cubic root of 1243401497 is about 1075.3185274231.

The spelling of 1243401497 in words is "one billion, two hundred forty-three million, four hundred one thousand, four hundred ninety-seven".