7742397 has 12 divisors (see below), whose sum is σ = 11179104. Its totient is φ = 4764240.

The previous prime is 7742387. The next prime is 7742401. The reversal of 7742397 is 7932477.

It is not a de Polignac number, because 7742397 - 2¹⁴ = 7726013 is a prime.

It is a super-2 number, since 2×7742397² = 119889422611218, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is an Ulam number.

7742397 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7742387) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7129 + ... + 8142.

It is an arithmetic number, because the mean of its divisors is an integer number (931592).

Almost surely, 2^7742397 is an apocalyptic number.

It is an amenable number.

7742397 is a deficient number, since it is larger than the sum of its proper divisors (3436707).

7742397 is a wasteful number, since it uses less digits than its factorization.

7742397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15300 (or 15287 counting only the distinct ones).

The product of its digits is 74088, while the sum is 39.

The square root of 7742397 is about 2782.5163072298. The cubic root of 7742397 is about 197.8298456547.

The spelling of 7742397 in words is "seven million, seven hundred forty-two thousand, three hundred ninety-seven".